Json.net custom serialize/deserialze with Converter/Contractsolver

Question

I am looking for a good way to serialize/deserialize the follwing JSON format. I know it's quite uncommon, but thats how it's given. Currently i am using json.net and I think it's quite good and customizable, but i haven't found any good solution. I'am aware of the CustomConverter and ContractResolver see post for example:

JSON.net ContractResolver vs. JsonConverter

But all my solutions don't feel right at the moment. Maybe you guys have a simple good solution

Here is the Json format: the main ressource here is the house (key1) for example api/house/1 get

the relations for this object are then given only with the fields typename and key, where as the main resource shows all "primitiv" types (as called in json.net : datetime, string, int..). The whole relation entity with their own fields are given in the "addition" section

  {
  "info": {
    "typename": "house",
    "key": "1",
    "ownFields": {
      "width": "10 meter",
      "height": "12 meter"
    },
    "relation": {
      "resident": {
        "info": [
          {
            "typename": "people",
            "key": "1"
          },
          {
            "typename": "people",
            "key": "3"
          }
        ]
      },
      "homeowner": {
        "info": {
          "typename": "people",
          "key": "4"
        }
      },
      "neighbors": {
        "info": [
          {
            "typename": "house",
            "key": "2"
          }
        ]
      }
    }
  },
  "addition": [
    {
      "typename": "people",
      "key": "1",
      "ownFields": {
        "firstname": "Martin",
        "lastname": "Keystone",
        "phone": "1234"
      },
      "relation": {
        "parent": {
          "info": {
            "typename": "people",
            "key": "6"
          }
        }
      }
    },
    {
      "typename": "people",
      "key": "2",
      "ownFields": {
        "firstname": "Sandra",
        "lastname": "Keystone",
        "phone": "1234"
      },
      "relation": {
        "parent": {
          "info": {
            "typename": "people",
            "key": "7"
          }
        }
      }
    }
  ]
}

For my class design i would prefer the following, but dont has to be this way

public class entity
{
    public string typename { get; set; } #maybe not needed since class name could be used
    public string key { get; set; }
}

public class house : entity
{
    public house() { }
    public string width { get; set; }
    public string height { get; set; }

    public people homeowner { get; set; }
    public List<people> resident { get; set; }
    public List<house> neighbors { get; set; }
}

public class people : entity
{
    public people() { }

    public string firstname { get; set; }
    public string lastname { get; set; }
    public string phone { get; set; }

    public people parent { get; set; }
}

I don't want to hardcode it into the customconverter, because i have a lot of those entites and they might change. Do you guys have any help on this one? thanks