Rename laravel collection "data" key

Is there way i can rename the data key in laravel collection results? At the moment this

DB::table('contracts AS C')->paginate(1)

returns

  {
  "current_page": 1,
    "data": [
        {
            "id": 191,
            "buyer": "John",
            "provider": "Jane"
        }
    ],
    "from": 1,
    "last_page": 1,
    "next_page_url": "",
    "path": "",
    "per_page": 1,
    "prev_page_url": null,
    "to": 1,
    "total": 1
}

What i would like is this

  {
  "current_page": 1,
    "parties": [
        {
            "id": 191,
            "buyer": "John",
            "provider": "Jane"
        }
    ],
    "from": 1,
    "last_page": 1,
    "next_page_url": "",
    "path": "",
    "per_page": 1,
    "prev_page_url": null,
    "to": 1,
    "total": 1
}

The challenge here changing the data key to parties

via Chebli Mohamed