def METHOD_NAME(app: App, media_id, data):
    """
    Notify currently playing webstream.
    Replaces: notify --webstream='#{json_str}' --media-id=#{!current_dyn_id}
    """
    logger.info("Sending currently playing webstream '%s' data '%s'", media_id, data)
    app.api_client.notify_webstream_data(data, media_id)