test.js

function saveDocument() {
    TXTextControl.saveDocument(TXTextControl.StreamType.InternalUnicodeFormat, function (content) {
        $.ajax({
            type: "POST",
            url: "/Home/Save?id=@Model.DocumentId",
            contentType: "application/json",
            data: JSON.stringify(content),
            success: function () {
                setDirtyFlag();
                $("#save").addClass("disabled");
            },
            error: function () {
                alert("An error occurred while saving the data.");
            }
        });
    });
}