Scheme Map listeners for object array change

Hello all,

I want to create a battleship game and i have the player SchemeMap and inside the player there is the board SchemeArray with the coordinates
How can i listen for change.
The whole object players is not updated and sent to the clients when i change field inside board and this syntax i think is old and doesn't work

his.room.listen("players/:id/:attribute", function (change: ObjectState) {
            if(change.path["attribute"] == "direction"){
                callback(change, thisScene);
            }
        });

how should i sent updates to the client regarding the board ?