public function save()
 {
     if (!Utils_Helper::verify_nonce_post(Setting::NONCE_GENERAL_NAME, Setting::NONCE_GENERAL_ACTION)) {
         Utils_Helper::error_server_json('not_permission_nonce');
         http_response_code(511);
         exit(0);
     }
     $this->save_fields();
     Utils_Helper::success_server_json('config_save_success', 'Operação realizada com sucesso.');
     exit(1);
 }