JSON accessors after ajax request

I've spent the last couple of hours trying to figure this out. I am making an ajax request using JQuery. I get the response in string format and I use

jQuery.parseJSON(response);

      

        
        
        
      

    

to convert it to Object. This is my answer:

{
    "columns": ["n"],
    "data": [
        [{
            "extensions": {},
            "labels": "http://localhost:7474/db/data/node/168/labels",
            "outgoing_relationships": "http://localhost:7474/db/data/node/168/relationships/out",
            "traverse": "http://localhost:7474/db/data/node/168/traverse/{returnType}",
            "all_typed_relationships": "http://localhost:7474/db/data/node/168/relationships/all/{-list|&|types}",
            "property": "http://localhost:7474/db/data/node/168/properties/{key}",
            "self": "http://localhost:7474/db/data/node/168",
            "properties": "http://localhost:7474/db/data/node/168/properties",
            "outgoing_typed_relationships": "http://localhost:7474/db/data/node/168/relationships/out/{-list|&|types}",
            "incoming_relationships": "http://localhost:7474/db/data/node/168/relationships/in",
            "create_relationship": "http://localhost:7474/db/data/node/168/relationships",
            "paged_traverse": "http://localhost:7474/db/data/node/168/paged/traverse/{returnType}{?pageSize,leaseTime}",
            "all_relationships": "http://localhost:7474/db/data/node/168/relationships/all",
            "incoming_typed_relationships": "http://localhost:7474/db/data/node/168/relationships/in/{-list|&|types}",
            "metadata": {
                "id": 168,
                "labels": []
            },
            "data": {
                "name": "1"
            }
        }]
    ]
}

      

        
        
        
      

    

I am trying to access certain elements of this object, but I get nothing. When I try this

var test = json.data;

      

        
        
        
      

    

it works, but how can i access the values ​​stored in the metadata. I try this, but I get "undefined":

var test = json.data.metadata.id;

      

        
        
        
      

    

Any idea what I'm missing?