def notify(self, data):
        """Notify this channel of inbound data"""
        string_channels = {
            ChannelIdentifiers.de_registrations,
            ChannelIdentifiers.registrations_expired
        }

        if data['channel'] in string_channels:
            message = {'device_id': data["value"], 'channel': data["channel"]}
        else:
            message = DeviceStateChanges._map_endpoint_data(data)

        return super(DeviceStateChanges, self).notify(message)