[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [TrackerCore](./node-tracker.trackercore.md) > [track](./node-tracker.trackercore.track.md) ## TrackerCore.track property Call with a payload from a buildX function Adds context and payloadPairs name-value pairs to the payload Applies the callback to the built payload Signature: ```typescript track: (pb: PayloadBuilder, context?: Array | null, timestamp?: Timestamp | null) => Payload | undefined; ```