messengerapi.Broker/code/MessengerBroker/Models/Http/Messages.cs

namespace MessengerBroker.Model.Http
{
    public class Messages
    {
        public class MessagesRequest
        {
            public Guid OwnerBrokerId { get; set; }

            public DateTime SinceUtc { get; set; }
        }

        public class MessagesResponse
        {
            public MessengerApi.Db.Entities.Message[] Messages { get; set; }
        }
    }
}