Can't upload file to BOX api
<p>I wrote this code. I send data to <code>$url = "https://upload.box.com/api/2.0/files/content"</code>, but i don't get a response. Maybe someone has also had this problem?</p>

<pre><code> $absolutePath = 'home/my/path/uploads/media/ClientPDF/0001/01/c607bea86bdb42220bb49aac722b4a5eb44be3db.pdf';

 $json = json_encode([
      'name'   =&gt; 'c607bea86bdb42220bb49aac722b4a5eb44be3db.pdf,
      'parent' =&gt; ['id' =&gt; 7479666489] //parent folder
 ]);

 $fields = [
     'attributes' =&gt; $json,
     'file'       =&gt; @$absolutePath
 ];

 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_HTTPHEADER, [
                   'Authorization: Bearer MY_TOKEN_KEY'
                   'Content-Type:multipart/form-data'
 ]);
 curl_setopt($ch, CURLOPT_POST, true);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
 $response = curl_exec($ch);
 var_dump(json_decode($response, true)); die;
</code></pre>

<p>var_dump - print nothing, i can't debug this request. Please, help me to solve this problem</p>