Get project TonAPI tier

Example response

{
  "tier": {
    "id": 1,
    "name": "Test tier",
    "rpc": 5,
    "usd_price": 100,
    "long_polling_sub": 50,
    "entity_per_conn": 10,
    "next_payment": 1690889913000,
    "date_create": 1690889913000
  }
}