curl --request POST \
  --url https://api.aisa.one/apis/v1/duffel/flights/order-changes/create \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": {
    "selected_order_change_offer": "oco_0000A4QasEUIjJ6jHKfhHU"
  }
}
'

import requests

url = "https://api.aisa.one/apis/v1/duffel/flights/order-changes/create"

payload = { "data": { "selected_order_change_offer": "oco_0000A4QasEUIjJ6jHKfhHU" } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({data: {selected_order_change_offer: 'oco_0000A4QasEUIjJ6jHKfhHU'}})
};

fetch('https://api.aisa.one/apis/v1/duffel/flights/order-changes/create', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.aisa.one/apis/v1/duffel/flights/order-changes/create",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'data' => [
        'selected_order_change_offer' => 'oco_0000A4QasEUIjJ6jHKfhHU'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.aisa.one/apis/v1/duffel/flights/order-changes/create"

	payload := strings.NewReader("{\n  \"data\": {\n    \"selected_order_change_offer\": \"oco_0000A4QasEUIjJ6jHKfhHU\"\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.aisa.one/apis/v1/duffel/flights/order-changes/create")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"data\": {\n    \"selected_order_change_offer\": \"oco_0000A4QasEUIjJ6jHKfhHU\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.aisa.one/apis/v1/duffel/flights/order-changes/create")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"data\": {\n    \"selected_order_change_offer\": \"oco_0000A4QasEUIjJ6jHKfhHU\"\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "data": {}
}

{
  "data": {
    "change_total_amount": "30.50",
    "change_total_currency": "GBP",
    "confirmed_at": "2020-01-17T11:51:43.114803Z",
    "created_at": "2020-04-11T15:48:11.642Z",
    "expires_at": "2020-01-17T10:42:14.545052Z",
    "id": "ocr_0000A3tQSmKyqOrcySrGbo",
    "live_mode": false,
    "new_total_amount": "121.30",
    "new_total_currency": "GBP",
    "order_id": "ord_0000A3tQcCRZ9R8OY0QlxA",
    "penalty_total_amount": "15.50",
    "penalty_total_currency": "GBP",
    "refund_to": "voucher",
    "slices": {
      "add": [
        {
          "destination": {
            "city_name": "London",
            "iata_city_code": "LON",
            "iata_code": "LHR",
            "iata_country_code": "GB",
            "icao_code": "EGLL",
            "id": "arp_lhr_gb",
            "latitude": 64.068865,
            "longitude": -141.951519,
            "name": "Heathrow",
            "time_zone": "Europe/London",
            "type": "airport",
            "airports": [
              {
                "city_name": "London",
                "iata_city_code": "LON",
                "iata_code": "LHR",
                "iata_country_code": "GB",
                "icao_code": "EGLL",
                "id": "arp_lhr_gb",
                "latitude": 64.068865,
                "longitude": -141.951519,
                "name": "Heathrow",
                "time_zone": "Europe/London",
                "city": {
                  "airports": [
                    {
                      "iata_code": "LHR",
                      "iata_country_code": "GB",
                      "icao_code": "EGLL",
                      "id": "arp_lhr_gb",
                      "latitude": 64.068865,
                      "longitude": -141.951519,
                      "name": "Heathrow",
                      "time_zone": "Europe/London"
                    }
                  ],
                  "iata_code": "LON",
                  "iata_country_code": "GB",
                  "id": "cit_lon_gb",
                  "name": "London"
                }
              }
            ],
            "city": {
              "airports": [
                {
                  "iata_code": "LHR",
                  "iata_country_code": "GB",
                  "icao_code": "EGLL",
                  "id": "arp_lhr_gb",
                  "latitude": 64.068865,
                  "longitude": -141.951519,
                  "name": "Heathrow",
                  "time_zone": "Europe/London"
                }
              ],
              "iata_code": "LON",
              "iata_country_code": "GB",
              "id": "cit_lon_gb",
              "name": "London"
            }
          },
          "destination_type": "airport",
          "duration": "PT02H26M",
          "fare_brand_name": "Basic",
          "id": "xxx_00009hthhsUZ8W4LxQgkjo",
          "origin": {
            "city_name": "London",
            "iata_city_code": "LON",
            "iata_code": "LHR",
            "iata_country_code": "GB",
            "icao_code": "EGLL",
            "id": "arp_lhr_gb",
            "latitude": 64.068865,
            "longitude": -141.951519,
            "name": "Heathrow",
            "time_zone": "Europe/London",
            "type": "airport",
            "airports": [
              {
                "city_name": "London",
                "iata_city_code": "LON",
                "iata_code": "LHR",
                "iata_country_code": "GB",
                "icao_code": "EGLL",
                "id": "arp_lhr_gb",
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                "longitude": -141.951519,
                "name": "Heathrow",
                "time_zone": "Europe/London",
                "city": {
                  "airports": [
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                      "iata_code": "LHR",
                      "iata_country_code": "GB",
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                      "longitude": -141.951519,
                      "name": "Heathrow",
                      "time_zone": "Europe/London"
                    }
                  ],
                  "iata_code": "LON",
                  "iata_country_code": "GB",
                  "id": "cit_lon_gb",
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              }
            ],
            "city": {
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                  "latitude": 64.068865,
                  "longitude": -141.951519,
                  "name": "Heathrow",
                  "time_zone": "Europe/London"
                }
              ],
              "iata_code": "LON",
              "iata_country_code": "GB",
              "id": "cit_lon_gb",
              "name": "London"
            }
          },
          "origin_type": "airport",
          "segments": [
            {
              "aircraft": {
                "iata_code": "380",
                "id": "arc_00009UhD4ongolulWd91Ky",
                "name": "Airbus Industries A380"
              },
              "arriving_at": "2020-06-13T16:38:02",
              "departing_at": "2020-06-13T16:38:02",
              "destination": {
                "city": {
                  "iata_code": "NYC",
                  "iata_country_code": "US",
                  "id": "cit_nyc_us",
                  "name": "New York"
                },
                "city_name": "New York",
                "iata_city_code": "NYC",
                "iata_code": "JFK",
                "iata_country_code": "US",
                "icao_code": "KJFK",
                "id": "arp_jfk_us",
                "latitude": 40.640556,
                "longitude": -73.778519,
                "name": "John F. Kennedy International Airport",
                "time_zone": "America/New_York"
              },
              "destination_terminal": "5",
              "distance": "424.2",
              "duration": "PT02H26M",
              "id": "xxx_00009hthhsUZ8W4LxQgkjo",
              "marketing_carrier": {
                "conditions_of_carriage_url": "https://www.britishairways.com/en-gb/information/legal/british-airways/general-conditions-of-carriage",
                "iata_code": "BA",
                "id": "arl_00001876aqC8c5umZmrRds",
                "logo_lockup_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-lockup/BA.svg",
                "logo_symbol_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-logo/BA.svg",
                "name": "British Airways"
              },
              "marketing_carrier_flight_number": "1234",
              "operating_carrier": {
                "conditions_of_carriage_url": "https://www.britishairways.com/en-gb/information/legal/british-airways/general-conditions-of-carriage",
                "iata_code": "BA",
                "id": "arl_00001876aqC8c5umZmrRds",
                "logo_lockup_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-lockup/BA.svg",
                "logo_symbol_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-logo/BA.svg",
                "name": "British Airways"
              },
              "operating_carrier_flight_number": "4321",
              "origin": {
                "city_name": "London",
                "iata_city_code": "LON",
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                "iata_country_code": "GB",
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                "id": "arp_lhr_gb",
                "latitude": 64.068865,
                "longitude": -141.951519,
                "name": "Heathrow",
                "time_zone": "Europe/London",
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                      "latitude": 64.068865,
                      "longitude": -141.951519,
                      "name": "Heathrow",
                      "time_zone": "Europe/London"
                    }
                  ],
                  "iata_code": "LON",
                  "iata_country_code": "GB",
                  "id": "cit_lon_gb",
                  "name": "London"
                }
              },
              "origin_terminal": "B",
              "passengers": [
                {
                  "baggages": [
                    {
                      "quantity": 1,
                      "type": "checked"
                    }
                  ],
                  "cabin_class": "economy",
                  "cabin_class_marketing_name": "Economy Basic",
                  "passenger_id": "passenger_0",
                  "seat": {
                    "designator": "14B",
                    "disclosures": [
                      "Do not seat children in exit row seats",
                      "Do not seat passengers with special needs in exit row seats"
                    ],
                    "name": "Exit row seat"
                  }
                }
              ]
            }
          ]
        }
      ],
      "remove": [
        {
          "destination": {
            "city_name": "London",
            "iata_city_code": "LON",
            "iata_code": "LHR",
            "iata_country_code": "GB",
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            "longitude": -141.951519,
            "name": "Heathrow",
            "time_zone": "Europe/London",
            "type": "airport",
            "airports": [
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            ],
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                }
              ],
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              "name": "London"
            }
          },
          "origin_type": "airport",
          "segments": [
            {
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              },
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              "departing_at": "2020-06-13T16:38:02",
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                  "name": "New York"
                },
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                "longitude": -73.778519,
                "name": "John F. Kennedy International Airport",
                "time_zone": "America/New_York"
              },
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              "distance": "424.2",
              "duration": "PT02H26M",
              "id": "xxx_00009hthhsUZ8W4LxQgkjo",
              "marketing_carrier": {
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                "id": "arl_00001876aqC8c5umZmrRds",
                "logo_lockup_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-lockup/BA.svg",
                "logo_symbol_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-logo/BA.svg",
                "name": "British Airways"
              },
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              "operating_carrier": {
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                "logo_symbol_url": "https://assets.duffel.com/img/airlines/for-light-background/full-color-logo/BA.svg",
                "name": "British Airways"
              },
              "operating_carrier_flight_number": "4321",
              "origin": {
                "city_name": "London",
                "iata_city_code": "LON",
                "iata_code": "LHR",
                "iata_country_code": "GB",
                "icao_code": "EGLL",
                "id": "arp_lhr_gb",
                "latitude": 64.068865,
                "longitude": -141.951519,
                "name": "Heathrow",
                "time_zone": "Europe/London",
                "city": {
                  "airports": [
                    {
                      "iata_code": "LHR",
                      "iata_country_code": "GB",
                      "icao_code": "EGLL",
                      "id": "arp_lhr_gb",
                      "latitude": 64.068865,
                      "longitude": -141.951519,
                      "name": "Heathrow",
                      "time_zone": "Europe/London"
                    }
                  ],
                  "iata_code": "LON",
                  "iata_country_code": "GB",
                  "id": "cit_lon_gb",
                  "name": "London"
                }
              },
              "origin_terminal": "B",
              "passengers": [
                {
                  "baggages": [
                    {
                      "quantity": 1,
                      "type": "checked"
                    }
                  ],
                  "cabin_class": "economy",
                  "cabin_class_marketing_name": "Economy Basic",
                  "passenger_id": "passenger_0",
                  "seat": {
                    "designator": "14B",
                    "disclosures": [
                      "Do not seat children in exit row seats",
                      "Do not seat passengers with special needs in exit row seats"
                    ],
                    "name": "Exit row seat"
                  }
                }
              ]
            }
          ]
        }
      ]
    }
  },
  "meta": {
    "limit": 123,
    "before": "<string>",
    "after": "<string>"
  }
}