Biblioteca TypeBox

import { RESTPostCreateTemplateBody } from '@rewritetoday/typebox/v1';
import { Parse } from '@sinclair/typebox/value';

const data = Parse(RESTPostCreateTemplateBody, {
  name: 'order_shipped',
  content: 'Hi {{first_name}}, your order {{order_id}} is on the way.',
  variables: [
    { name: 'first_name', fallback: 'customer' },
    { name: 'order_id', fallback: '0000' },
  ],
});

console.log(data);

import { WebhookEvent } from '@rewritetoday/typebox/v1';
import { Parse } from '@sinclair/typebox/value';

let event;

try {
  event = Parse(WebhookEvent, payload);
} catch (error) {
  console.error({ error });
  throw new Error('Payload de webhook Rewrite invalido');
}

console.log({ data: event });