Getting html error 415 unsupported media type

[Anumeha Ayushi]

Hello,
Whenever I try to hit the below request from soap ui or postman I get 415
error message.

$.ajax({
  method: "POST",
  url: "services/user/hash?sid=78189aff-d68d-458a-8840-5b18d15a50b0",
  data: {user: JSON.stringify({
      firstname: 'John',
      lastname: 'Doe',
      externalId: 'uid1',
      externalType: 'myCMS',
      login: 'superjohn'
      }),
    options: JSON.stringify({
      roomId: 5,
      moderator: true,
      showAudioVideoTest: true
      })
    },
  dataType: "json"})