"pieces": [
  {
    "length": 100.0
  },
  {
    "length": 100.0,
    "switch": true
  },
  {
    "radius": 200,
    "angle": 22.5
  }
]

"cars": [
  {
    "id": {
      "name": "Schumacher",
      "color": "red"
    },
    "dimensions": {
      "length": 40.0,
      "width": 20.0,
      "guideFlagPosition": 10.0
    }
  }
]

public class Car
{
    [JsonProperty(PropertyName = "id")]
	public CarId Id { get; set; }

    [JsonProperty(PropertyName = "dimensions")]
	public CarDimensions Dimensions { get; set; }
}

public class CarId
{
    [JsonProperty(PropertyName = "name")]
	public string Name { get; set; }

    [JsonProperty(PropertyName = "color")]
	public string Color { get; set; }
}

public class CarDimensions
{
	[JsonProperty(PropertyName = "length")]
	public int Length { get; set; }

    [JsonProperty(PropertyName = "width")]
	public int Width { get; set; }

	[JsonProperty(PropertyName = "guideFlagPosition")]
	public int GuideFlagPosition { get; set; }
}

public class RaceWrapperWrapper
{
	[JsonProperty(PropertyName = "msgType")]
	public string MsgType {
		get;
		set;
	}

	[JsonProperty(PropertyName = "data")]
	public RaceWrapper Data {
		get;
		set;
	}
}

public class RaceWrapper
{
	[JsonProperty(PropertyName = "race")]
	public Race Data { get; set; }
}