Проблема с curl запросом

<?php
$myCurl = curl_init();
$data = array(
    'saleid'=>'328751050',
'location'=>'shop_browse',
'amount'=>'285',
'internal_search'=>'',
'csrf'=>'xxxxxxxxxxxxxxxxxxxx'
);
curl_setopt( $myCurl, CURLOPT_URL, 'https://api.opskins.com/ICart/AddToCart/v1/' );
curl_setopt( $myCurl, CURLOPT_HTTPHEADER, array (
 'origin: https://opskins.com', 
 'accept-encoding: gzip, deflate, br', 
 'accept-language: ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7', 
 'user-agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36', 
 'content-type: application/x-www-form-urlencoded; charset=UTF-8', 
 'accept: */*', 
 'referer: https://opskins.com/?loc=shop_browse&app=730_2', 
 'authority: api.opskins.com', 
 'cookie: chok=chok1; woop=woop; yes=no',
 ));
curl_setopt($myCurl,CURLOPT_ENCODING, '');
 curl_setopt($myCurl, CURLOPT_FOLLOWLOCATION, true);
 curl_setopt($myCurl, CURLOPT_COOKIEFILE, '');
 curl_setopt($myCurl, CURLOPT_HEADER, 0);
 curl_setopt($myCurl, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($myCurl, CURLOPT_PROXYPORT, '8000');
curl_setopt($myCurl, CURLOPT_PROXY, '1.1.1.1');
curl_setopt($myCurl, CURLOPT_PROXYUSERPWD, 'xxxx:xxxxxx');
curl_setopt( $myCurl, CURLOPT_POST, 1 );
curl_setopt($myCurl, CURLOPT_POSTFIELDS, $data);
curl_setopt ($myCurl, CURLOPT_SSL_VERIFYPEER, 0);        
 echo 'Error curl: ' . curl_error($myCurl);
curl_close($myCurl);
?>

Пытаюсь нажать на кнопку на целевом сайте, действие не проходит, ошибку не возвращает.