try {
  parseFeedbackInfo({"token":"U2FsdGVkX1+Wkmv1UJkukTUJ7J2Wnsv4J7hJY1LIQvdqbq4yL7m9duz6CyQ9tqlvGW6Tyj8Rb3A=","useful":3});
}catch(e){
  //alert(e);
}