try {
  parseFeedbackInfo({"token":"U2FsdGVkX19cdmkykehA/VuqqWLXf3K6k7Q/UmjfGXVAuFgRku9tZRN1VJew0jTsHs8nPf+Fks4=","useful":3});
}catch(e){
  //alert(e);
}