List Seats

[  {    "provider": "string",    "product": "string",    "plan": "string",    "pool": "default",    "seat_price_usd": "string",    "seat_count": 1,    "included_allowance_usd": "string",    "allowance_provenance": "published",    "reset_cadence": "monthly",    "model_filter": "%",    "effective_from": "2019-08-24",    "id": "string"  }]