| Name | Type | Description | Notes |
|---|---|---|---|
| merchantAccount | String | the merchant account which will be used to process the payment | |
| modificationAmount | Amount | [optional] | |
| originalReference | String | the pspreference of the payment to modify | |
| reference | String | the reference assigned to this modification | [optional] |
| additionalData | Object | a map of name/value pairs for passing in additional / industry-specific data | [optional] |