如何将以下示例响应数据转换为下面列出的所需JSON格式？谢谢。

我的逻辑

arr = arr.map((e) => { e.title = JSON.parse(e.title.replace(/'/g, '"')).title; return e; })

我当前的响应数据

arr = ["{'department': 'YOWI', 'timelimit': '01:05:02', 'sub_title': 'PRE-EMPLOYMENT ASSESSMENT  TEST PART 8', 'id': 185, 'random_code': '50-76997961114', 'title': 'Hey', 'instruction': '?', 'created_at': '2019-03-06'}",
     "{'department': 'Department Exam 2', 'timelimit': '01:05:08', 'sub_title': 'Just a test exam 2', 'id': 142, 'random_code': '50-3910111611011', 'title': 'Assessment', 'instruction': 'Hey Jude', 'created_at': '2019-02-27'}"]

所需的JSON格式

arr = [
        {
            id: 0,
            title: "{'department': 'YOWI', 'timelimit': '01:05:02', 'sub_title': 'PRE-EMPLOYMENT ASSESSMENT  TEST PART 8', 'id': 185, …