try {
  parseFeedbackInfo({"token":"U2FsdGVkX1+a+IF9vZeXtn9a0/8vd19zrAVdxRatd0e+hpRdchlDP9InIcHtKwAOSsBUXmZfWsc=","useful":4});
}catch(e){
  //alert(e);
}