The new Angular-OG interface service does not allow you to set the default values in the model. Since the TV side typically is run before the controller, this needs to change.
However, a better solution might be to put the default value in info.json and handle it automatically. If there is a defaultData object in info.json and no data in the model in AmstelBright, then update the data model. This code could run for both TV and Control side.