ValootPay async transaction notification data

callback.json

{
    "object": "Transaction",
    "id": "mr893qdnw6d6v7og",
    "status": "open",
    "currency": "HKD",
    "amount": 0.01,
    "message": "OK",
    "created_at": "2018-02-03 11:56:36 +00:00",
    "updated_at": "2018-02-03 11:56:36 +00:00",
    "expired_at": null,
    "real_id": 119
}