Add subnavlink to catalog parent page

catalogSubnav.cs

public class SubnavLink
{
    public string parentId { get; set; }
    public string[] path { get; set; }
    public string href { get; set; }
    public string appId { get; set; }
    public string windowTitle { get; set; }
}

[TestMethod]
public void SubnavLinks_Manually()
{
  var applicationResource = new Mozu.Api.Resources.Commerce.Settings.ApplicationResource(_apiContext);
  var entityResource = new Mozu.Api.Resources.Platform.Entitylists.EntityResource(_apiContext);
  var SubnavLinkEntityName = "subnavlinks@mozu";
  var appId = applicationResource.ThirdPartyGetApplicationAsync().Result.AppId;
  var subnavLink = new SubnavLink()
  {
      appId = appId,
      href = "https://75d65fb7.ngrok.io/",
      parentId = "catalog",
      path = new string[] { "Orders1" },
      windowTitle = "Test1 Extension"
  };
  
  
  var entity = Newtonsoft.Json.Linq.JObject.FromObject(subnavLink);
  
  var jObjectReturned = entityResource.InsertEntityAsync(entity, SubnavLinkEntityName).Result;
}