Sitting Skeleton(Packet

so i want to add Sitting Skeleton
I was trying this code but this doesnt work

Please tell me how to add Sitting Skeleton!

PHP:

$player = $event->getPlayer();
$pk = new AddEntityPacket();
$pk->eid = 114514;
$pk->type = 34;
$pk->x = $player->x;
$pk->y = $player->y;
$pk->z = $player->z;
$pk->speedX = 0;
$pk->speedY = 0;
$pk->speedZ = 0;
$pk->yaw = 0;
$pk->pitch = 0;
$pk->meta = 0;
$pk->metadata = [Entity::DATA_FLAGS => [Entity::DATA_TYPE_BYTE,1 << Entity::DATA_FLAG_RIDING]];
Server::broadcastPacket(Server::getInstance()->getOnlinePlayers(),$pk);
$pk = new SetEntityLinkPacket();
$pk->from = 114514;
$pk->to = $player->getId();
$pk->type = 1;
Server::broadcastPacket(Server::getInstance()->getOnlinePlayers(),$pk);

Why do you hardcode 114514? Use Entity::$entityCount++.