ModelValidationFilter.cs

public class ModelBindingFailureFilter : IActionFilter
{
    public void OnActionExecuted(ActionExecutedContext context)
    {
    }

    public void OnActionExecuting(ActionExecutingContext context)
    {
        if (!context.ModelState.IsValid)
        {
            context
                .HttpContext
                .Response
                .ContentType = "application/problem+json";

            var validationProblems = new ValidationProblemDetails(
                context.ModelState)
            {
                Title = "One or more validation errors occurred",
                Status = (int)HttpStatusCode.BadRequest,
                Instance = context.HttpContext.TraceIdentifier
            };

            context.Result = new BadRequestObjectResult(validationProblems);
        }
    }
}