Web.API 2 model state validation action filter

ValidateModelAttribute.cs

using System;
using System.Net;
using System.Net.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;

namespace MyAwesomeWebApi.ActionFilters
{
    /// <summary>
    /// Returns 400 if the ModelState is invalid.
    /// </summary>
    [AttributeUsage(AttributeTargets.All, AllowMultiple = false, Inherited = true)]
    public class ValidateModelAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            if (actionContext.ModelState.IsValid)
                return;

            actionContext.Response = actionContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState);
        }
    }
}

ValuesController.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using System.Web.Http;
using System.Web.Http.Description;
using System.ComponentModel.DataAnnotations;

namespace MyAwesomeWebApi.Controllers
{
    public class ValuesController : ApiController
    {
        [ValidateModel]
        public IHttpActionResult Post(MyModel model)
        {
            var valService = new ValService();
            var result = valService.Create(model);
            return Created($"api/values/{result.Id}", result);
        }
    }
    
    public class MyModel
    {
        [Required]
        public int Id { get; set; }
    }
}