AutoRest code generation

log.txt

Generating client code and adding to project started
Generate client code for REST API with following parameters:
REST API Name: MyApplication.Web, Base namespace: EpicastMedia.PodcastAggregator.ApiClient, Metadata file path: C:\Users\dan\Downloads\EpicastSwagger.json
[Info]AutoRest Core 0.9.7.0
[Info]Initializing code generator.
[Info]Successfully initialized CSharp Code Generator 1.0.5584.22489
[Info]Initializing modeler.
[Info]Successfully initialized Swagger Modeler 1.0.5584.22490
[Info]Parsing swagger json file.
[Info]Generating client model from swagger model.
[Info]Initializing code generator.
[Info]Successfully initialized CSharp Code Generator 1.0.5584.22489
[Fatal]Error generating syntax tree: Failure during generation of method Put.
Failure during serialization generation of method Put.
System.NotSupportedException: MyApplication.Services.Models.UserSettings - False

System.NotSupportedException: MyApplication.Services.Models.UserSettings - False
   at Hyak.SerializationGenerator.CreateSerializationMethod(ISerializationBase serializationFormat)
   at Hyak.JsonSerializationGenerator.SerializeJsonRequest[T](StatementsBuilder`1 builder, IJsonBase root)
   at Hyak.JsonSerializationFramework.Serialize[T](ISerializationBase serialization, StatementsBuilder`1& builder)
   at Hyak.CodeGeneratorExtensions.SerializationExtensions`1.Serialize(IDictionary`2 requestBodyDefinitions, Type& requestType)
   at Hyak.ClientGenerator.<>c__DisplayClass3a`1.<SerializeRequest>b__37()
   at Hyak.Ensure.ErrorContext(Action action, String context)
Exception: There was an error during code generation when trying to add a client for the REST API
Generating client code and adding to project failed
Adding REST API client for failed

swagger.json

{
    "swagger": "2.0",
    "info": {
        "version": "v1",
        "title": "MyApplication.Web"
    },
    "host": "localhost:62614",
    "schemes": [
        "http"
    ],
    "paths": {
        "/api/user/settings": {
      "put": {
        "tags": [
          "UserSettings"
        ],
        "operationId": "UserSettings_Put",
        "consumes": [
          "application/json",
          "text/json",
          "application/xml",
          "text/xml",
          "application/x-www-form-urlencoded"
        ],
        "produces": [
          "application/json",
          "text/json",
          "application/xml",
          "text/xml"
        ],
        "parameters": [
          {
            "name": "settings",
            "in": "body",
            "required": true,
            "schema": {
              "$ref": "#/definitions/MyApplication.Services.Models.UserSettings"
            }
          }
        ],
        "responses": {
          "204": {
            "description": "NoContent"
          }
        },
        "deprecated": false
      }
        }
    },
  "definitions": {
    "MyApplication.Services.Models.UserSettings": {
      "type": "object",
      "properties": {
        "BackSeconds": {
          "format": "int32",
          "type": "integer"
        },
        "ForwardSeconds": {
          "format": "int32",
          "type": "integer"
        }
      }
    }
  }
}

UserSettings.cs

using MyApplication.Data;
using MyApplication.Services.Models;
using Swashbuckle.Swagger.Annotations;
using System.Data.Entity;
using System.Net;
using System.Threading.Tasks;
using System.Web.Http;
using System.Web.Http.Description;

namespace MyApplication.Web.Controllers.api
{
    [RoutePrefix("api/user/settings")]
    public class UserSettingsController : ApiController
    {
        // PUT: api/Settings
        [Route("")]
        [SwaggerResponseRemoveDefaults]
        [SwaggerResponse(HttpStatusCode.NoContent)]
        public async Task<IHttpActionResult> Put(UserSettings settings)
        {
            return StatusCode(HttpStatusCode.NoContent);
        }
    }
}

Clearing the route appears to be due to a bug. If I don't do it, the api path is "api/usersettings" instead of the desired "api/user/settings".
Updated code:

        public async Task<IHttpActionResult> Post(UserSettings settings)
        {
            return StatusCode(HttpStatusCode.NoContent);
        }

Updated JSON:

    "/api/UserSettings": {
      "post": {
        "tags": [
          "UserSettings"
        ],
        "operationId": "UserSettings_Post",
        "consumes": [
          "application/json",
          "text/json",
          "application/xml",
          "text/xml",
          "application/x-www-form-urlencoded"
        ],
        "produces": [
          "application/json",
          "text/json",
          "application/xml",
          "text/xml"
        ],
        "parameters": [
          {
            "name": "settings",
            "in": "body",
            "required": true,
            "schema": {
              "$ref": "#/definitions/EpicastMedia.PodcastAggregator.Services.Models.UserSettings"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK",
            "schema": {
              "$ref": "#/definitions/System.Object"
            }
          }
        },
        "deprecated": false
      }
    }

And I get the same error message.

Running:
Azure Tools 2.9.1
VS 2015 Update 2
Microsoft.Rest.ClientRuntime 0.9.6 (I tried upgrading but it reverted back when I ran the add REST API client again)

Any other ideas @bradygaster?