| Name | Description | Type | Additional information | 
|---|---|---|---|
| cancelled_by | string | None. | |
| event_timestamp | string | None. | |
| state | string | None. | |
| reference_id | string | None. | |
| cancellation_reason | string | None. | |
| type | string | None. | |
| is_added | boolean | None. | |
| is_return | boolean | None. |