How to return json after form.submit()?

 <form id="NotificationForm" action="<%=Url.Action("Edit",new{Action="Edit"}) %>" method="post" enctype="multipart/form-data" onsubmit='getJsonRequestAfterSubmittingForm(this); return false;'>
      <%Html.RenderPartial("IndexDetails", Model);%>
     </form>

 $.ajax({
        url: '<%=Url.Action("Edit","Notification") %>',
        type: "POST",
        dataType: 'json',
        data: $("#NotificationForm").submit(),
        contentType: "application/json; charset=utf-8",
        success: function(result) {
            if (result.Result == true) {
                alert("ghjghsgd");
            }
        },
        error: function(request, status, error) {
            $("#NotSelectedList").html("Error: " & request.responseText);
        }

    });