Change entity nametag for player

I'm trying to change entity nametag for just one player, but nothing happens

PHP:

$packet = new SetEntityDataPacket();
$packet->entityRuntimeId = $entity->getId();
$packet->metadata = [Entity::DATA_NAMETAG => [Entity::DATA_TYPE_STRING, $name[0] . "\n" . TextFormat::GREEN . "Unlocked"]];
$player->dataPacket($packet);


 

PHP:

$packet = new SetEntityDataPacket();
$packet->entityRuntimeId = $entity->getId();
$packet->metadata = [Entity::DATA_NAMETAG => [Entity::DATA_TYPE_STRING, $name[0] . "\n" . TextFormat::GREEN . "Unlocked"]];
$player->dataPacket($packet);
$entity->despawnFromAll();
$entity->spawnToAll();


The nametag bug on 1.6 and 1.7