Aspnet API controller parameter not deserializing correctly

I'm pretty new to C# and ASP.NET. I have an API controller with this action method:

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace Mautic.Webhook 
{
    [ApiController]
    [Route("mautic/[controller]")]
    public class WebhookController : ControllerBase
    {
        public WebhookController(ILogger<WebhookController> logger)
        {
            Logger = logger;
        }

        [HttpPost]
        public ActionResult WebhookAction(WebhookRequest data)
        {
            Logger.LogInformation(ObjectDumper.Dump(data.LeadPostDelete));
            return NoContent();
        }

        private ILogger<WebhookController> Logger { get; }
    }
}

And have this definition of WebhookRequest:

using System.Collections.Generic;
using Newtonsoft.Json;

namespace Mautic 
{
    public class ContactWebhookRequest 
    {
        public int id { get; set; }
        public string timestamp { get; set; }
    }

    public class WebhookRequest
    {
       [JsonProperty(PropertyName = "mautic.lead_post_delete")]
       public List<ContactWebhookRequest> LeadPostDelete { get; set; }
       public string timestamp { get; set; }
    }
}

When I receive data in the controller I want it to deserialize to my class but I got null on LeadPostDelete property. Does ASP.NET understand the Newtonsoft JsonProperty attribute? Or do I need to migrate it to System.Text.Json?

Also migrating to System.Text.Json is enough or I will need to deserialize this by hand on my controller?