using System.Collections.Generic;
public static void Main()
var payload = new Payload();
payload.PassthroughParameters.Add("Foo", "Bar");
var jsonString = JsonSerializer.Serialize(payload, new JsonSerializerOptions {
Console.WriteLine(jsonString);
public string Id { get; set; }
public IDictionary<string, string> PassthroughParameters { get; set; } = new Dictionary<string, string>();