我正在尝试使用jolt将数组值转换为字符串到我的对象。将数组值转换为String时，无法在对象中获取正确的值。

输入Json：

  "id": [
    "123","245"
  ],"lastName": [
    "john","Mary"
  ],"firstName": [
    "doe","Ann"
  ],"subjects": [
    [
      "['Maths']","['Science']","['English']"
    ],[
      "['English']","['accounts']","['Art']"
    ]
  ]
}

震动规格：

[{
  "operation": "shift","spec": {
    "*": {
      "*": {
        "*": {
          "$": "[&2].&3"
        }
      }
    }
  }
}]

预期输出：

[ {
  "id" : "123","lastName" : "john","firstName" : "doe","subjects" : [ ["['Maths']","['English']"] ]
},{
  "id" : "245","lastName" : "Mary","firstName" : "Ann","subjects" : [ ["['English']","['Art']"] ]
} ]

实际输出：

[ {
  "id" : "123","subjects" : [ "0","1","2" ]
},"2" ]
} ]

请帮助。预先感谢。