[
  { "pack_id": 10000, "slot": "general", "tier": "bronze",    "card_id": 100, "rate_pct": 50.0, "is_leader": false, "is_alt_art": false },
  { "pack_id": 10000, "slot": "general", "tier": "bronze",    "card_id": 101, "rate_pct": 26.5, "is_leader": false, "is_alt_art": false },
  { "pack_id": 10000, "slot": "general", "tier": "legendary", "card_id": 200, "rate_pct": 1.5,  "is_leader": false, "is_alt_art": false },
  { "pack_id": 98001, "slot": "bonus",   "tier": "special",   "card_id": 300, "rate_pct": null, "is_leader": true,  "is_alt_art": false },
  { "pack_id": 98001, "slot": "bonus",   "tier": "special",   "card_id": 301, "rate_pct": null, "is_leader": true,  "is_alt_art": false }
]