curl --request POST \
  --url https://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start \
  --header 'Content-Type: application/*+json' \
  --data '
{
  "AppUserId": 111111,
  "Balance": 0,
  "SecretToken": "43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff",
  "TerminalId": 77788,
  "TransactionId": 12345678
}
'

import requests

url = "https://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start"

payload = {
    "AppUserId": 111111,
    "Balance": 0,
    "SecretToken": "43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff",
    "TerminalId": 77788,
    "TransactionId": 12345678
}
headers = {"Content-Type": "application/*+json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/*+json'},
  body: JSON.stringify({
    AppUserId: 111111,
    Balance: 0,
    SecretToken: '43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff',
    TerminalId: 77788,
    TransactionId: 12345678
  })
};

fetch('https://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start', 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://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start",
  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([
    'AppUserId' => 111111,
    'Balance' => 0,
    'SecretToken' => '43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff',
    'TerminalId' => 77788,
    'TransactionId' => 12345678
  ]),
  CURLOPT_HTTPHEADER => [
    "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://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start"

	payload := strings.NewReader("{\n  \"AppUserId\": 111111,\n  \"Balance\": 0,\n  \"SecretToken\": \"43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff\",\n  \"TerminalId\": 77788,\n  \"TransactionId\": 12345678\n}")

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

	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://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start")
  .header("Content-Type", "application/*+json")
  .body("{\n  \"AppUserId\": 111111,\n  \"Balance\": 0,\n  \"SecretToken\": \"43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff\",\n  \"TerminalId\": 77788,\n  \"TransactionId\": 12345678\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://lynx.nayax.com/payment/v2/transactions/Cortina/{integratorName}/start")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/*+json'
request.body = "{\n  \"AppUserId\": 111111,\n  \"Balance\": 0,\n  \"SecretToken\": \"43262a8f8136f704b3d42b3f116e4bb0c4bf69e6d3415aff6e2cb9dfe06630ff\",\n  \"TerminalId\": 77788,\n  \"TransactionId\": 12345678\n}"

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

{
  "Status": {
    "StatusMessage": "Cortina V2 Stub Tester",
    "Verdict": "Approved"
  }
}