docs: function parseBody(req) {
      return extractBody(req)
          .then(() => {
              if (req.body && typeof req.body === 'object') return req.body;
              try {
                  return JSON.parse(req.body);
              } catch (err) {
                  throw Error('Unexpected body format received. Expected application/json, received: ' + req.body);
              }
          });
  }