curl --request POST \
  --url https://api.contiguity.co/enterprise/lease/relinquish/{number} \
  --header 'Authorization: Bearer <token>'

{
  "id": "rqn_abc123",
  "object": "relinquished_confirmation",
  "created_at": 123,
  "data": {
    "oos": 1735689600,
    "number": "14155552671"
  }
}