curl --request POST \
  --url http://localhost:8080/contests/contests/referral \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "start_at": "2023-11-07T05:31:56Z",
  "end_at": "2023-11-07T05:31:56Z",
  "description": "<string>",
  "prize_text": "<string>",
  "contest_type": "referral_paid",
  "daily_summary_time": "12:00:00",
  "daily_summary_times": "<string>",
  "timezone": "UTC",
  "is_active": true,
  "created_by": 123
}
'

{
  "id": 123,
  "title": "<string>",
  "contest_type": "<string>",
  "start_at": "2023-11-07T05:31:56Z",
  "end_at": "2023-11-07T05:31:56Z",
  "daily_summary_time": "<string>",
  "timezone": "<string>",
  "is_active": true,
  "final_summary_sent": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "description": "<string>",
  "prize_text": "<string>",
  "daily_summary_times": "<string>",
  "last_daily_summary_date": "2023-12-25",
  "last_daily_summary_at": "2023-11-07T05:31:56Z",
  "created_by": 123
}