public class Rootobject
{
    public string deviceType { get; set; }
    public Devicedata[] deviceData { get; set; }
}

public class Devicedata
{
    public int cameraAt { get; set; }
    public Cameradata[] cameraData { get; set; }
}

public class Cameradata
{
    public string type { get; set; }
    public Pointinfo[] pointInfo { get; set; }
}

public class Pointinfo
{
    public int frame { get; set; }
    public Position position { get; set; }
}

public class Position
{
    public float x { get; set; }
    public float y { get; set; }
    public float z { get; set; }
}