curl --request GET \
  --url https://api.example.com/api/v1/campaigns/{campaign_id}/leads \
  --header 'Authorization: Bearer <token>'

{
  "leads": [
    {
      "campaign_lead_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "campaign_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "dataset_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "row_index": 123,
      "current_step": 123,
      "variant_map": {},
      "lead_data": {},
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "next_action_at": "2023-11-07T05:31:56Z",
      "assigned_alias_id": "<string>"
    }
  ],
  "total": 123,
  "page": 123,
  "page_size": 123
}