param is a JSON-serialized string. The table below describes its decoded logical fields.| parameter name | Is it mandatory | type of data | length | example | description |
|---|---|---|---|---|---|
| mchOrderId | mandatory | string | 10-32 | CCP20220428011068111 | Merchant order ID, format: letters + numbers, 10-32 characters |
| timestamp | mandatory | long | - | 1678356680000 | Millisecond timestamp |