public static function listByPlaybackId(
        $user,
        $playback_id,
        $page = 1,
        $per_page = 20,
        $order_by = self::ORDERBY_CREATED_AT,
        $order_dir = self::ORDERDIR_ASC,
        $include_finished = false,
        $hash_type = false,
        $hash = false
    ) {
        return self::listSubscriptions(
            $user,
            $page,
            $per_page,
            $order_by,
            $order_dir,
            $include_finished,
            'playback_id',
            $playback_id
        );
    }