Invalid Json to valid json

How to convert below json to valid json

{  
  "attribute_id":"r2d2",
  "attribute_values":[  
    WrappedArray(    [  
      5      b1ed5df4a0330a13a3b6f4c,
      {  
        "L0":{  
          "name":"ENTERTAINMENT",
          "id":"20000"
        },
        "L1":{  
          "name":"VIDEO GAMES BOOKS AND OTHER MEDIA",
          "id":"26000"
        },
        "L2":{  
          "name":"MEDIA",
          "id":"26001"
        },
        "L3":{  
          "name":"BOOKS",
          "id":"26100"
        },
        "L4":{  
          "name":"BOOKS MISC L4",
          "id":"26800"
        }
      },
      PRIORITY_OTHERS,
      1536662873016,
      26800
    ]    )
  ],
  "bu":"0",
  "item_id":"705024754",
  "last_updated_by":"QARTH",
  "mart":"0",
  "published_at":"1536662873017",
  "source":"RAMP",
  "timestamp":"1536662873016",
  "vertical":"0",
  "wpid":"7HX1KF1N9W9Y"
}