How to listen to changes from server-side?

Hi I'm using unity client,

On the server-side I set

constructor() {
        super();
        this.setState({
            players: {},
            messages: [],
            turn: 0
        });
    }

update() {
for (var id in this.state.players) {
            this.state.players[id].score += 1;
        }
}

In the client side how to listen to changes on player scores?
I tried those code but can't get it done, examples:

 room.Listen("players/:id/score", change => {
            print("Operation " + change.operation);
            print("New player update " + change.value);

            foreach (var key in change.path.Keys)
            {
                print(string.Format("{0}: {1}", key, change.path[key]));
            }
        });

or

 room.Listen("players/:id/:*", change =>
        {
            print("Operation " + change.operation);
            print("New player update " + change.value);

            foreach (var key in change.path.Keys)
            {
                print(string.Format("{0}: {1}", key, change.path[key]));
            }
        });