Basic Headers Required
| Key | Value |
| Content-Type | application/json |
| Authorization | InterswitchAuth Base64(ClientID) |
| Timestamp | Current Timestamp |
| Nonce | Unique |
| Signature | Signature Computation |
| SignatureMethod | SHA1 |
| BankCode | 999 |
| authData | AuthData is a combination of your payment’s sensitive data mainly: PAN, PIN, expiry date, and CVV. |
| userId | ava.fola |