[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [JsonProcessor](./node-tracker.jsonprocessor.md) ## JsonProcessor type A function which will processor the Json onto the injected PayloadBuilder Signature: ```typescript type JsonProcessor = (payloadBuilder: PayloadBuilder, jsonForProcessing: EventJson, contextEntitiesForProcessing: SelfDescribingJson[]) => void; ```