curl --request GET \
  --url https://api.meetcampfire.com/rr/api/v1/contracts/{contract_id}/subscriptions \
  --header 'Authorization: <api-key>'

[
  {
    "id": 123,
    "lines": "<string>",
    "product_name": "<string>",
    "total_value": 0,
    "is_contract_amendment": true,
    "start_date": "2023-12-25",
    "end_date": "2023-12-25",
    "mrr": 0,
    "notes": "<string>",
    "use_daily_accounting": true,
    "use_catchup": true,
    "catchup_date": "2023-12-25",
    "created_at": "2023-11-07T05:31:56Z",
    "last_modified_at": "2023-11-07T05:31:56Z",
    "customer": 123,
    "contract": 123,
    "product": 123,
    "modified_subscription": 123
  }
]