Bad request when trying to post to wcf rest 4 service - rest

Question

I am playing with the wcf 4.0 rest template and trying to get it to work with jquery.
I have created a new rest template project and added a webform into the same project just to get things simple.
I have slightly modfied the Create Method to look like this
[WebInvoke(UriTemplate = "", Method = "POST")]
public string Create(SampleItem instance)
{
// TODO: Add the new instance of SampleItem to the collection
return (instance.Id == 1) ? "1 was returned" : "something else was returned";
}
Then from my webform I am using this.
<script type="text/javascript">
$(document).ready(function () {
$.ajax({
type: 'POST',
url: "/service1/",
data: { "Id": 1,"StringValue": "String content"
},
success: function (data) {
$('.result').html(data);
},
error: function (error) {
$('.result').html(error)
},
dataType: "json",
contentType: "application/json; charset=utf-8"
});
});
</script>
<div class="result"></div>
However fiddler is returning a 400 error telling me there is a request error. Have I done something wrong?

Answer 1

400 can also mean something in your service went wrong. Did you try to attach a debugger to the Rest-service?
Tried to create a .Net-console application (create the request using HttpClient) and communicate with your service?
I ran into same error, after half hour of testing I saw just some error occured in the REST-service.