[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [buildSelfDescribingEvent](./node-tracker.buildselfdescribingevent.md) ## buildSelfDescribingEvent() function Build 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 Signature: ```typescript declare function buildSelfDescribingEvent>(event: SelfDescribingEvent): PayloadBuilder; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | event | SelfDescribingEvent<T> | Contains the properties and schema location for the event | Returns: PayloadBuilder PayloadBuilder to be sent to