Create a new ticket not working

I am trying to create ticket using REST API from C# httpClient but I keep getting:

RT/5.0.0 200 Ok
# Required: id, Queue

Here is my implementation:

using (var httpClient = new HttpClient(handler) { BaseAddress = baseAddress })
   httpClient.DefaultRequestHeaders.Authorization = 
                    new AuthenticationHeaderValue("token", "my-auth-token");
                //param.Request is the CreateTicketRequest class
                var content = new StringContent(JsonConvert.SerializeObject(param.Request));
                var createResponse = await httpClient.PostAsync("REST/1.0/ticket/new", content);
                var createdTicketStr = await createResponse.Content.ReadAsStringAsync();

This is my CreateTicketRequest class:

    public class CreateTicketRequest
        public CreateTicketRequest()
            id = "ticket/new";
        public string id { get; set; }
        public string Queue { get; set; }
        public string Requestor { get; set; }
        public string Subject { get; set; }
        public string Cc { get; set; }
        public string AdminCc { get; set; }
        public string Status { get; set; }
        public int Priority { get; set; }
        public string Text { get; set; }

Did anyone else face the same issue? Any help would be appreciated.

Thanks in advance.

The 1.0 endpoint doesn’t speak JSON. It speaks email formatted content:

You may want the 2.0 endpoint.