[
  { "pack_id": 10000, "short_code": "Basic", "animation_rate_pct": 8.0, "has_bonus_slot": false, "special_kind": null },
  { "pack_id": 98001, "short_code": "98ANV", "animation_rate_pct": 8.0, "has_bonus_slot": true,  "special_kind": "leader_card" }
]