Is there any way to set spring MVC to receive an object with subobject?

I have in my project a controller that receives data via jquery. But this data is converted into an object containing subobject. that is:

class Teste{
    String a;
    String b;
    Test2 teste2;
}

class Test2{
    String c;
    String d;
}

No controller is getting with the following code.

    @ResponseBody
    @RequestMapping(value = "/novo",
            method = RequestMethod.POST,
            consumes = MediaType.APPLICATION_JSON_VALUE,
            produces = MediaType.APPLICATION_JSON_VALUE
    )
    public Teste cadastrar(Teste teste) {
        System.out.println("\n\n*******************TESTE*******************\n" + teste);
        return teste;
    }

In this way the data is only sent by query params. So I can not pass the subobjects. The ajax function used is as follows.

$.ajax({
    type: 'POST',
    url: '/teste/novo?' + jQuery.param(teste),
    contentType: 'application/json',
    data: JSON.stringify(product),
    success: function (data) {
        //innerOptionsInHTML(data);
    }
}).done(function () {
    console.log("success");
}).fail(function () {
    console.log("error");
});

In this way the subobjects are not passed to the server. In fact it only started being passed when using QueryParams. Before that the function would send with type application_json. But it still did not work.

All this using spring MVC and I need to pass the subobjects.

It would be more interesting if you could configure Spring MVC to receive the object via javascript in the form:

{
    a:"a",
    b:"b",
    teste:{
        c:"c",
        d:"d"
    }
}

without the use of params query.