Uncaught SyntaxError: Unexpected token e when try to parse a JSON string

I try to use JSON.parse to return a javascript object of the string below. However, I receive "Uncaught SyntaxError: Unexpected token e" .

{
    "__type": "HRIS.oHRData, HRIES, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
    "TPDDListValue": new Ajax.Web.DataSet([]),
    "DPDDListValue": new Ajax.Web.DataSet([]),
    "TopDataValue": new Ajax.Web.DataSet([
        new Ajax.Web.DataTable([
            ["HID","System.String"],
            ["HFrName0","System.String"],
            ["HFtName0","System.String"],
            ["HGFName0","System.String"],
            ["HFmName0","System.String"],
            ["TID","System.Byte"]
        ],[
            ["123456789","ABCD1","ABCD2","ABCD3 ","ABCD4",2]
        ])
    ]),
    "DownDataValue": new Ajax.Web.DataSet([]),
    "MenuDataValue": new Ajax.Web.DataSet([]),
    "SearchReturnValue": new Ajax.Web.DataSet([]),
    "Result": null,
    "NewID": "NoID",
    "AffectedRecords": 0
}

I use this code:

var text= 'the json string here';

var obj=JSON.parse(text);

I think the issue is that JSON doesn't recognize the type of new Ajax.Web.DataSet([])

How can I solve this issue, please?

Any idea is appreciated.

Many thanks,

---

If you're really just dropping that into your code, you don't need quotes and you don't need to parse it:

var theObject = {
    "__type": "HRIS.oHRData, HRIES, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
    "TPDDListValue": new Ajax.Web.DataSet([]),
    "DPDDListValue": new Ajax.Web.DataSet([]),
    "TopDataValue": new Ajax.Web.DataSet([
        new Ajax.Web.DataTable([
            ["HID","System.String"],
            ["HFrName0","System.String"],
            ["HFtName0","System.String"],
            ["HGFName0","System.String"],
            ["HFmName0","System.String"],
            ["TID","System.Byte"]
        ],[
            ["123456789","ABCD1","ABCD2","ABCD3 ","ABCD4",2]
        ])
    ]),
    "DownDataValue": new Ajax.Web.DataSet([]),
    "MenuDataValue": new Ajax.Web.DataSet([]),
    "SearchReturnValue": new Ajax.Web.DataSet([]),
    "Result": null,
    "NewID": "NoID",
    "AffectedRecords": 0
};

This will require that whatever service provides that Ajax object exists.

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