seregazhuk\PinterestBot\Helpers\UrlBuilder::buildRequestString PHP Метод

    public static function buildRequestString($request)
    {
        return self::fixEncoding(http_build_query($request));
    }

 /**
  * @param integer $entityId
  * @return string
  */
 public function createFollowRequestQuery($entityId)
 {
     $entityName = $this->getEntityIdName();
     $dataJson = ['options' => [$entityName => (string) $entityId], 'context' => []];
     if ($entityName == 'interest_id') {
         $dataJson['options']['interest_list'] = 'favorited';
     }
     $post = ['data' => json_encode($dataJson, JSON_FORCE_OBJECT)];
     return UrlBuilder::buildRequestString($post);
 }