Node.js Lambda undefined payload for Genesys Cloud WEM webhook

NICE CXone API & Integrations
1

Trying to parse the conversation object from a Genesys Cloud WEM webhook in an AWS Lambda function using Node.js 18.

Here is the handler:

exports.handler = async (event) => {
 console.log(event.body);
 const payload = JSON.parse(event.body);
 console.log(payload.conversation.id);
};

Getting TypeError: Cannot read properties of undefined (reading 'id'). The logs show event.body is a string but payload seems empty or malformed. Why is payload.conversation undefined?