Я нашел ответ, это был код, который работает.
<?php
$post_array = array(
"cid" => "199",
"sid" => "2",
"uid" => $_POST['uid'],
"optin_email" => $_POST['optin_email'],
"optin_email_timestamp" => $_POST['optin_email_timestamp'],
"optin_phone" => $_POST['optin_phone'],
"optin_phone_timestamp" => $_POST['optin_phone_timestamp'],
"optin_sms" => $_POST['optin_sms'],
"optin_sms_timestamp" => $_POST['optin_sms_timestamp'],
"optin_postal" => $_POST['optin_postal'],
"optin_postal_timestamp" => $_POST['optin_postal_timestamp'],
"f_1_email" => $_POST['f_1_email'],
"f_3_firstname" => $_POST['f_3_firstname'],
"f_4_lastname" => $_POST['f_4_lastname'],
"f_11_postcode" => $_POST['f_11_postcode'],
"f_12_phone1" => $_POST['f_12_phone1'],
"f_135_nombre_empresa" => $_POST['f_135_nombre_empresa'],
"f_134_cantidad_vehiculos" => $_POST['f_134_cantidad_vehiculos'],
"f_133_tipo_servicio" => $_POST['f_133_tipo_servicio']
);
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://leadtowin.databowl.com/api/v1/lead",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => http_build_query($post_array),
CURLOPT_HTTPHEADER => array(
"Content-Type: application/x-www-form-urlencoded",
"Accept-Encoding: UTF-8",
"Content-Type: application/x-www-form-urlencoded",
"Cookie: PHPSESSID=d053646c7953d9116849a8aa4717ab81"
),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;
?>