Tracking de eventos

{
  "event": "email.delivery",
  "is_test": false,
  "timestamp": "2026-04-29T15:30:42.123Z",
  "project_id": "...",
  "data": {
    "activity_id": "...",
    "message_id": "...",
    "recipient": "user@example.com",
    "event_type": "delivery",
    "event_timestamp": "2026-04-29T15:30:42.000Z"
  }
}

const crypto = require('crypto');
const expected = 'sha256=' + crypto
  .createHmac('sha256', apiKey)
  .update(rawBody)
  .digest('hex');
if (req.headers['x-rqe-signature'] !== expected) {
  return res.status(401).send('Invalid signature');
}