api-docs/docs/node-tracker/markdown/node-tracker.selfdescribingevent.md
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[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [SelfDescribingEvent](./node-tracker.selfdescribingevent.md)
## SelfDescribingEvent interface
A Self Describing Event A custom event type, allowing for an event to be tracked using your own custom schema and a data object which conforms to the supplied schema
<b>Signature:</b>
```typescript
interface SelfDescribingEvent
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [event](./node-tracker.selfdescribingevent.event.md) | SelfDescribingJson | The Self Describing JSON which describes the event |