Post to a Cake Controller with $this->data ala Cake.

controllers.js

$scope.enviar = function() {
            if($('#contactar form').form('is valid')) {
                $('#contactar form').addClass('loading');

                var url  = app_backend + '/contactar/post/' + id + '/post.json';
                var data = {};
                angular.forEach($scope.Contacto, function(field, value) {
                    console.log(field, value);

                    if(angular.isUndefined(value)) {
                        value = '';
                    }

                    fname = 'data[Contacto][' + field +']';
                    data[fname] = value;
                });

                $http({
                    method: 'PUT',
                    url: url,
                    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
                    transformRequest: function(obj) {
                        var str = [];
                        for(var p in obj)
                            str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
                        return str.join("&");
                    },
                    data: data
                }).success(function(response, status, headers, config) {
                    // this callback will be called asynchronously
                    // when the response is available
                    if(response && angular.isDefined(response)) {
                        $('#contactar form').modal('hide');
                    }

                    $('#contactar form').removeClass('loading');

                }).error(function(response, status, headers, config) {
                    // called asynchronously if an error occurs
                    // or server returns response with an error status.
                    //console.log('--- Error posting Company, response:');
                    //console.log(response);

                    $('#contactar form').removeClass('loading');
                });

            }
        };