curl --request POST \
  --url https://api.getsly.ai/v1/v1/approvals/{id}/reject \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reason": "<string>"
}
'

{
  "data": {
    "id": "<string>",
    "status": "pending",
    "amount": "<string>",
    "currency": "<string>",
    "agent": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>"
    },
    "approver_role": "owner",
    "created_at": "2023-11-07T05:31:56Z",
    "expires_at": "2023-11-07T05:31:56Z",
    "merchant": {
      "id": "<string>",
      "name": "<string>"
    },
    "description": "<string>",
    "context": {},
    "decided_at": "2023-11-07T05:31:56Z",
    "decided_by": "<string>",
    "comment": "<string>"
  }
}