curl --request POST \
  --url https://sandbox.killb.app/api/v2/backoffice/ramps/fail \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transferId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "reason": "<string>"
}
'

{
  "message": "<string>"
}