[DataContract]
public class PageJsonModel
{
    public static readonly int NameMaxLength = 100;
    public static readonly int UrlMaxLength = 250;
    private const string UrlValidSimbolsMask = @"^[0-9a-zA-Z\-_\=\+\~\!\@\$\&\*\(\) ]*([\.\/][0-9a-zA-Z\-_\=\+\~\!\@\$\&\*\(\) ]*)*/?$";
    private const string UrlInvalidSubstringsMask = @"^(Sys|Admin|EmailTracker|Captcha|Content|WebDav|Common|Errors|Widget|Logs|Resources|RadControls|App_Themes|Payments|DES|event-.*|page-.*|Info/TermsOfUse|Info/UsageGuidelines|Info/PrivacyPolicy|Info/DialogOuterFrame)(/.*)?$|^(SupportTicketsHandler\.ashx|DESGetFiles\.aspx|ViewEvent\.aspx|DocumentHandler\.ashx|KeepSessionAlive\.ashx|CheckHttpsAuthentication\.aspx|Default\.aspx)$|(^.*?\.(config|asmx|axd|jpe?g|png|bmp|gif|swf|js|css))$";

    [DataMember(Name = "customUrl")]
    public string CustomUrl { get; set; }

    [DataMember(Name = "name")]
    public string Name { get; set; }

    [DataMember(Name = "seoSettings")]
    public SeoSettingsModel SeoSettings { get; set; }

    public static ValidationModel ValidationModel
    {
        get
        {
            var factory = new ValidationModelBuilder();

            return factory.CreateValidationModel<PageJsonModel>().Rules
                          .MaxLength.Of(o => o.Name).Is(NameMaxLength).FieldTitle(ValidationResources.PageName_FieldTitle)
                          .MaxLength.Of(o => o.CustomUrl).Is(UrlMaxLength).FieldTitle(ValidationResources.PageCustomUrl_FieldTitle)
                          .Mask.Of(o => o.CustomUrl).Is(UrlValidSimbolsMask).Description(UrlValidSimbolsMask).FieldTitle(ValidationResources.PageCustomUrl_FieldTitle)
                          .Mask.Of(o => o.CustomUrl).IsNegative(UrlInvalidSubstringsMask).ErrorMessage(ValidationResources.PageCustomUrl_ConflictsWithSystemUrls)
                          .CustomRule.Of(string.Empty).Is(typeof(CustomUrlUniqueValidationRule)).PinErrorMessageTo(o => o.CustomUrl).ErrorMessage(ValidationResources.PageCustomUrl_NotUnique)
                          .SubRules.Of(o => o.SeoSettings).Is(SeoSettingsModel.ValidationModel);
        }
    }
}

[HttpPost, ValidateToken, InitApplicationHttpContext, ScriptRequestHandleError]
public ActionResult Save(PageJsonModel data)
{
    PageJsonModel.ValidationModel.ThrowIfNotValid(data);