"Possible Duplicates" Smart list not found when using REST API

We are trying to export data from "Possible Duplicates" smart list using REST API but getting error smart list not found. Any help on why this is happening.

    "filter": {

        "smartListName": "Possible Duplicates"

    }

}

Response:

{

    "requestId": "db0f#16fd83b03b3",

    "success": false,

    "errors": [

        {

            "code": "1003",

            "message": "Smart list 'Possible Duplicates' not found"

        }

    ]

}