# HelloSign::EventCallbackRequestEvent
Basic information about the event that occurred.
## Properties
| Name | Type | Description | Notes |
| ---- | ---- | ----------- | ----- |
| `event_time`*_required_ | ```String``` | Time the event was created (using Unix time). | |
| `event_type`*_required_ | ```String``` | Type of callback event that was triggered. | |
| `event_hash`*_required_ | ```String``` | Generated hash used to verify source of event data. | |
| `event_metadata`*_required_ | [```EventCallbackRequestEventMetadata```](EventCallbackRequestEventMetadata.md) | | |