return from get function in web Api spcial json format in asp web api

hi im retun from web api spcial json format this format

{
   "JobTitle": {
       "Sex":"?",
       "City":"?",
       "Date":"1395/06/24",
       "ActivityField":"?",
       "Salary":"?",
       "WorkHours":"?",
       "Insurance":"?",
       "Address":"?"
   },
   .
   .
   .
   .
}