@ganoo7

/**
   * main script entry point
   * @param request
   * @param response
   */
   function onStart (request: nlobjRequest, response: nlobjResponse) {
      const body = request.getBody() // body will contain the JSON/XML sent from webhook
      response.setContentType('XMLDOC')
      response.write('some response to the webhook')
  }

Thanks @stalbert

that's a starting point. but the documentation has some reasonable examples. best of luck!