/**
* @return string
*/
public function createUrl()
{
$prefix = strpos($this->url, '?') ? '&' : '?';
$timestamp = time();
$nonce = mt_rand();
return $this->url . $prefix . http_build_query(array('timestamp' => $timestamp, 'nonce' => $nonce, 'signature' => Request::createSignature($this->token, $timestamp, $nonce)));
}
