Uploade images using jquery $.ajax + webapi

public class Person{

  [Required] 
  public string Name {get;set;}

  public HttpPostedFileBase Photo{ get; set; }

}

[HttpPost]        
public HttpResponseMessage Save(Person person)
           
  if (!ModelState.IsValid)
  {
     Request.CreateResponse(HttpStatusCode.BadRequest)
  }
  return Request.CreateResponse(HttpStatusCode.OK);
                   
}

And here is my doubt : How to configure the ajax call?

With "?????" I show where are my doubts. 

<pre>

function SaveImage(){

  var ulr= 'http://localhost:5555/api/Uploader/';

  var person = { 
          Name : 'Donald',
          Photo : ?????       //--->  what hould I assign to photo?
          };

   
$.ajax({
        url: url,
        method: "POST",
        data: person,
        cache: false,
        dataType: ???? ,  //  json ??
        contentType: ????
    }).done(function (res) {
        alert('OK');
    })
    .fail(function (res) {
        alert('PROBLEMS!!');
    })

}