curl --request POST \
  --url https://api.example.com/conversations/{conversation}/messages \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": "<string>",
  "parent_id": 123
}
'

import requests

url = "https://api.example.com/conversations/{conversation}/messages"

payload = {
    "message": "<string>",
    "parent_id": 123
}
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({message: '<string>', parent_id: 123})
};

fetch('https://api.example.com/conversations/{conversation}/messages', 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.example.com/conversations/{conversation}/messages",
  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([
    'message' => '<string>',
    'parent_id' => 123
  ]),
  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://api.example.com/conversations/{conversation}/messages"

	payload := strings.NewReader("{\n  \"message\": \"<string>\",\n  \"parent_id\": 123\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://api.example.com/conversations/{conversation}/messages")
  .header("Content-Type", "application/json")
  .body("{\n  \"message\": \"<string>\",\n  \"parent_id\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/conversations/{conversation}/messages")

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  \"message\": \"<string>\",\n  \"parent_id\": 123\n}"

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

{
  "id": 1,
  "type": "<string>",
  "conversationId": 123,
  "is_reply": true,
  "parent": null,
  "deleted": true,
  "message": "<string>",
  "date": 123,
  "edited_at": 123,
  "reactions": [
    {}
  ],
  "author": {
    "id": 1,
    "first_name": "John",
    "last_name": "Doe",
    "name": "John Doe",
    "title": "Manager",
    "active": true,
    "avatar": {},
    "archived_at": 123,
    "participant_type": "<string>",
    "subtext": "Manager - HQ (Sales)",
    "department": {
      "id": 10,
      "name": "Sales"
    },
    "unit": {
      "id": 5,
      "name": "HQ"
    }
  },
  "files": [
    {
      "id": 1,
      "name": "document.pdf",
      "mime": "application/pdf",
      "size": 102400,
      "type": "file",
      "extension": "pdf",
      "uploaded": true,
      "processing": false,
      "height": 123,
      "width": 123,
      "source": "<string>",
      "stream": "<string>",
      "versions": {},
      "screenshot": "<unknown>",
      "date": 123,
      "created_at": 123,
      "updated_at": 123,
      "created_formatted": "<string>",
      "updated_formatted": "<string>"
    }
  ],
  "voice": {
    "id": 1,
    "processing": true,
    "extension": "mp3",
    "duration": 12.5,
    "url": "<string>"
  }
}