curl --request POST \
  --url https://api.aobapay.com/v1/charge/refund/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "comment": "<string>"
}
'

{
  "error": "<unknown>",
  "status": 200,
  "data": {
    "id": "ch_123456",
    "externalID": "pedido-123",
    "amount": 200,
    "comment": "Se arrependeu ;("
  }
}