curl --request PATCH \
  --url https://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "observations_referral": "This client is a VIP. Please give him a good table."
}
'

import requests

url = "https://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations"

payload = { "observations_referral": "This client is a VIP. Please give him a good table." }
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({observations_referral: 'This client is a VIP. Please give him a good table.'})
};

fetch('https://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations', 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://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'observations_referral' => 'This client is a VIP. Please give him a good table.'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations"

	payload := strings.NewReader("{\n  \"observations_referral\": \"This client is a VIP. Please give him a good table.\"\n}")

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

	req.Header.Add("X-Api-Key", "<api-key>")
	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.patch("https://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"observations_referral\": \"This client is a VIP. Please give him a good table.\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://channels-service-alpha.fourvenues.com/bookings/{bookingId}/observations")

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

request = Net::HTTP::Patch.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"observations_referral\": \"This client is a VIP. Please give him a good table.\"\n}"

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

{
  "data": {
    "_id": "<string>",
    "event_id": "<string>",
    "organization_id": "<string>",
    "channel_id": "<string>",
    "referral_id": "<string>",
    "status": "pending",
    "zone_slug": "<string>",
    "rate_slug": "<string>",
    "quantity": 123,
    "full_name": "<string>",
    "email": "<string>",
    "phone": "<string>",
    "deposit": 123,
    "fee_type": "percentage",
    "fee_quantity": 123,
    "qr_code": "<string>",
    "activation_code": "<string>",
    "payment_id": "<string>",
    "table_id": "<string>",
    "observations_referral": "<string>",
    "observations_client": "<string>",
    "marketing_consent": true,
    "payment_url": "<string>",
    "birthdate": "<string>",
    "billing_info": {
      "customer_type": "individual",
      "customer_name": "<string>",
      "document_type": "dni",
      "document_number": "<string>",
      "address": "<string>",
      "city": "<string>",
      "postal_code": "<string>",
      "country": "<string>"
    }
  },
  "success": true
}