[Need HELP] How to create a entity when I know the v3?

I want to create a entity (PrimedTNT) with v3....

I'm trying to learn how to add entities into levels, so here is what I think it is:

PHP:

$this->getServer()->getLevel()->addEntity(new PrimedTNT());

well... ->_<-

Entity::createEntity()

I know.. But ... 就是createEntity("PrimedTNT"这里写什么);

PHP:

/** @var Vector3 $v3 */
/** @var Level $level */
$nbt = new Compound("", [
  "Pos" => new Enum("Pos", [
    new Double("", $v3->x),
    // same with y and z
  ]),
  "Motion" => new Enum("Motion", [
    new Double("", 0.0),
    new Double("", 0.2),
    new Double("", 0.0)
  ]),
  "Rotation" => new Enum("Rotation", [
    new Float("", 0),
    new Float("", 0)
  ]),
  "Fuse" => new Byte("Fuse", 80)
]);
$ent = Entity::createEntity(new PrimedTNT($level->getChunk($v3->x >> 4, $v3->z >> 4), $nbt)));
$ent->spawnToAll();

I don't really get it still...