Angular http method: 'POST' is not sending the $Scope object

Question

I’m having a problem in the angular http method post, I’ve seen several tips but none works. Follow the code:

$scope.cadastrar = function () {
   $http({
        method: 'POST',
        url: '/MinhaConta/Cliente/PostAnuncio',
        data: $.param($scope.novo),
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
    })
    .success(function (data, status, headers, config) {
        if (data.Status) {
           $scope.hasMsg = true;
           $scope.hasError = false;
           $scope.hasSuccess = true;
           $scope.infoMsg = data.Mensagem;
        }
    })
    .error(function (data, status, headers, config) {
        $scope.hasMsg = true;
       $scope.hasSuccess = false;
       $scope.hasError = true;
       $scope.infoMsg = data.ErrorMessage;
    });
};

I put the scope to display the information of my object as I insert:

I inserted a breakpoint to see if the object has value

Response ends up returning me an error which is a default return if the object is null. Would anyone know to tell me what I’m doing wrong?

{ "tipoid": 0, "marcaid": 0, "modeloid": 0, "versaoid": 0, "anofabrication": 0, "anomodel": 0, "km": 0, "value": 0.0, "colour": null, "fuel": null, "plate": null, "vscustom": null, "exchange": false }

public class NovoVeiculo
{
    public int tipoid { get; set; }
    public int marcaid { get; set; }
    public int modeloid { get; set; }
    public int versaoid { get; set; }
    public short anofabricacao { get; set; }
    public short anomodelo { get; set; }
    public int km { get; set; }
    public decimal valor { get; set; }
    public string cor { get; set; }
    public string combustivel { get; set; }
    public string placa { get; set; }
    public string vscustom { get; set; }
    public bool troca { get; set; }
}

Thanks in advance for the help.