| Name | Type | Description | Notes |
|---|---|---|---|
| Amount | decimal? | Order amount (must be non-zero). | |
| BalanceDefinitionId | string | Unique identifier (UUID) of the associated balance definition. | |
| ContactId | int? | Unique identifier of the contact placing the order (must be ≥ 1). | |
| DueAt | string | RFC3339 timestamp specifying when the order is due. | |
| ExpiresAt | string | Optional RFC3339 timestamp defining order expiration. | [optional] |
| Meta | Object | Optional metadata associated with the order. | [optional] |
| Source | string | Specifies the origin of the order (`engine` or `user`). |