parsing complex json object

Hi I am trying to parse json object below. But the problem is, inside the profile attribute, there is an attribute called fields which is sometimes a json object and sometime an json-array, so it is creating a problem when i am trying to use Gson to parse it. I followed this link but it didn't help How to dynamically handle json response array/object using Gson , so help is needed from someone who encountered this before, thanks!.

{
  "users": {
    "profile": [
      {
        "fields": {
          "key": "fname",
          "value": "Michael"
        }        
      },
      {
        "fields": [
          {
            "key": "lname",
            "value": "Bob"
          },
          {
            "key": "age",
            "value": "25"
          }

        ]
      }

    ]
  }
}