Thank you, This is working. Facing issue with one more spec similar for converting JSON to Array.

Input JSON:

[
  {
    "bI": {
      "id": "t1",
      "locale": [
        "id_ID",
        "id_ID"
      ],
      "tempName": "",
      "name": "Test1",
      "isActive": false,
      "pT": "Re"
    },
    "id": "t1",
    "ContextID": "id_ID",
    "cf": {
      "name": "asd"
    },
    "dE": {
      "sS": "arte"
    },
    "mk": {},
    "pd": {}
  }
]

spec applied:

[
  {
    "operation": "shift",
    "spec": {
      "*": {
        "*": "&",
        "bI": {
          "*": "bI.&",
          "tempName": {
            "": "&2.&1",
            "*": {
              "@1": "&3.&2"
            }
          }
        }
      }
    }
  }
]

O/p:

{
  "bI" : {
    "id" : "t1",
    "locale" : [ "id_ID", "id_ID" ],
    "tempName" : null,
    "name" : "Test1",
    "isActive" : false,
    "pT" : "Re"
  },
  "id" : "t1",
  "ContextID" : "id_ID",
  "cf" : {
    "name" : "asd"
  },
  "dE" : {
    "sS" : "arte"
  },
  "mk" : { },
  "pd" : { }
}

Expected output:

[
{
  "bI" : {
    "id" : "t1",
    "locale" : [ "id_ID", "id_ID" ],
    "tempName" : null,
    "name" : "Test1",
    "isActive" : false,
    "pT" : "Re"
  },
  "id" : "t1",
  "ContextID" : "id_ID",
  "cf" : {
    "name" : "asd"
  },
  "dE" : {
    "sS" : "arte"
  },
  "mk" : { },
  "pd" : { }
}
]