Java - Gson parsing nested within nested

I have to interact with an API, and the response format (from what I've read) seems to be poorly structured. I've found a google groups reply to a somewhat similiar problem here, but I'm having trouble implementing a Response class to handle the Gson.fromJson. Is there an example I'm missing that's out there?

{

"response":{
    "reference": 1023, 
    "data":{
        "user":{
            "id":"210",
            "firstName":"john",
            "lastName":"smith",
            "email":"pocahontas@gmail.com",
            "phone":"",
            "linkedid":{
                "id":"238"
            }
        }
    }
}

}