using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var thing = JsonConvert.DeserializeObject<MyClass>("{\"title\":\"some title\",\"timestamp\":\"2022-01-01T00:00:00.000Z\",\"numbers\":[1,2,3]}");

        Console.WriteLine(thing.Title);

        Console.WriteLine(thing.SomeTimestamp); // NOTE: this is a default value because the JSON property is named differently than the class property

        Console.WriteLine(string.Join(",", thing.Numbers));

    }

    public class MyClass

    {

        public string Title { get; set; }

        public DateTime SomeTimestamp { get; set; }

        public List<int> Numbers { get; set; } = new List<int>();

    }

}