$curl = curl_init($apiUrl);

        $curlPostData = array(
                        "force_post" => urlencode("true"),
                        "auth_hash" => $authHash,
                        "urlencoded_filename" => urlencode($fileName),
                        "auth_token" => $authToken,
                        "xhr_uploader" => urlencode("true"),
                        'userfile_0"; filename="fake-name"' => $fileData

   );

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: multipart/form-data"));
        curl_setopt($curl, CURLOPT_USERPWD, $pydioRestUser . ":" . $pydioRestPw);
        curl_setopt($curl, CURLOPT_POST, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPostData);
        $response = curl_exec($curl);