| Property | Type | Description | Required |
|---|---|---|---|
| clientEventId | string | GUID assigned by client to associate with the event | Yes |
| clientEventType | ClientEventType | Type of the event which took place | Yes |
| clientEvent | ClientEvent | Event which took place | Yes |
| clientEventTimestamp | string | ISO-8601 timestamp representing when the event took place | Yes |
| clientEventMetadata | ClientEventMetadata | Metadata to associate with event, if applicable | Depends on which ClientEventType is specified. See ClientEventMetadata for more information. |