curl --request POST \
  --url https://clawconnected.com/api/negotiations/{id}/round \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "rate_cents": 1,
  "hours_per_week": 84,
  "start_date": "2023-12-25",
  "payout_delay_days": 6
}
'

{
  "error": {
    "code": "VALIDATION_FAILED",
    "message": "<string>",
    "issues": "<array>"
  }
}