I have a GeoDjango model object that I want't to serialize to json. I do this in my view:

```
lat = float(request.GET.get('lat'))
lng = float(request.GET.get('lng'))
a = Authority.objects.get(area__contains=Point(lng, lat))
if a:
    return HttpResponse(simplejson.dumps({'name': a.name, 
                                          'area': a.area.geojson,
                                          'id': a.id}), 
                        mimetype='application/json')

```

The problem is that `simplejson` considers the a.area.geojson as a simple string, even though it is beautiful pre-generated json. This is easily fixed in the client by `eval()`'ing the area-string, but I would like to do it proper. Can I tell `simplejson` that a particular string is already json and should be used as-is (and not returned as a simple string)? Or is there another workaround?

**UPDATE**
Just to clarify, this is the json currently returned:

```
{
    "id": 95,
    "name": "Roskilde",
    "area": "{ \"type\": \"MultiPolygon\", \"coordinates\": [ [ [ [ 12.078701, 55.649927 ], ... ] ] ] }"
}

```

The challenge is to have "area" be a json dictionary instead of a simple string.