/**
  * getting songs list in json format
  * @param array $input
  * @return json 
  */
 public function searchAlbum($input)
 {
     $albums = parent::searchAlbum(json_decode($input, true));
     if ($albums) {
         return $this->buildAnswer(true, 'Ok', array($albums));
     } else {
         return $this->buildAnswer(false, 'Cannot fetch albums at this time');
     }
 }