Gremlin queries containing Nested Objects & Apostrophes

function generateGremlinPostArticleQuery(data) {
  let query = `g.addV('article')`;
  for (const key in data) {
    if (data.hasOwnProperty(key)) {
      if (typeof data[key] === 'object') {
        query += `.property('${key}', '${JSON.stringify(data[key])}')`;
        continue;
      }
      query += `.property('${key}', '${data[key]}')`;
    }
  }
  return query;
}