Doing a GET passing a complex object with angular

I am using AngularJs and Resources module. I want to do a GET to obtain an object.. to do this GET I do not have to pass simply the ID to the server, but I should pass a complex object with different properties and values..

Here the code I am using:

$scope.getActivationStatus = function (event) {
    event.preventDefault();

    if ($scope.segui_attivazione_form.$valid) {
        $scope.activationStatus =
            new SeguiAttivazioneService
                .seguiAttivazione()
                .$get(
                    {
                        request: $scope.activationStatus
                    }, function () { });
    }
};

On server side I have:

[HttpGet]
public IHttpActionResult GetActivationStatus(MyComplexObject request)
{
    //I will do something here later...
    return Ok();
}

The problem is that "request" arrive on server equals to NULL... I have solved the problem passing two strings to the server... in this way:

$scope.getActivationStatus = function (event) {
    event.preventDefault();

    if ($scope.segui_attivazione_form.$valid) {
        $scope.activationStatus =
            new SeguiAttivazioneService
                .seguiAttivazione()
                .$get(
                    {
                        codiceFiscale: $scope.activationStatus.CodiceFiscale,
                        codiceRichiesta: $scope.activationStatus.CodiceRichiesta
                    }, function () { });
    }
};

And server side:

[HttpGet]
public IHttpActionResult GetActivationStatus(string codiceFiscale, string codiceRichiesta)
{
    return Ok();
}

In this way everything works... but I don't like this solution because I will have more than two input... And this is a get, not a post (not a save, an update)...

How can I pass a complex object doing a GET?

Thank you...

It's best to use the POST method if you want to send data in the body of the request. While it's possible with Angular, some servers might ignore the body of GET requests.