How to make a sign that shows if server is updated? [SOLVED]

EDIT: I found a way how to do it guys ;D

So I think there is one in MM2 and it tells you on a sign either the server is the most updated or outdated. I would like to replicate this. I have tried using market place service but is doesn't work?

local GameID = game.PlaceId;
local Asset = game:GetService("MarketplaceService"):GetProductInfo(GameID) -- My place Id
local tracker = Instance.new("StringValue")
tracker.Name = "UpdateTracker"
tracker.Parent = script
tracker.Value = Asset.Updated

Thanks!