try {
  parseFeedbackInfo({"token":"U2FsdGVkX1/e2SMLjHaHtFmqHKVUmpT0+0rLRCt9WpY2CoBEzPPbZkCFD1c/yiZ5By/eDFqjiqw=","useful":3});
}catch(e){
  //alert(e);
}