$http.put($scope.config.apiEndpoint + '/' + pk +'?ngrestCallType=update&fields='+fieldName, angular.toJson(json, true)).then(() => {
                AdminToastService.success(i18nParam('js_ngrest_toggler_success', {field: fieldLabel}));
            }, function(data) {
                $scope.printErrors(data.data);
            })