OrchardCore: Admin menu: unable to set Permission over item from recipe

Hi All,

I have created and admin menu with this item:

{
              "$type": "OrchardCore.AdminMenu.AdminNodes.LinkAdminNode, OrchardCore.AdminMenu",
              "LinkText": "Libreria Multimediale",
              "LinkUrl": "Admin/Media",
              "IconClass": "far fa-images",
              "UniqueId": "[js:uuid()]",
              "Enabled": true,
              "Text": null,
              "Id": "media-first-level",
              "Href": null,
              "Url": null,
              "Position": null,
              "LinkToFirstChild": true,
              "LocalNav": false,
              "Culture": null,
              "Resource": null,
              "Items": [],
              "RouteValues": null,
              "Permissions": [{ "name": "ManageMediaContent" }],
              "Classes": ["media-first-level"]
}

but when I run my recipe I receive this error:

2020-10-15 19:09:54.6967|Default||1b4aa20d-49cd3a81eecc7d6b.||Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware|ERROR|An unhandled exception has occurred while executing the request. Newtonsoft.Json.JsonSerializationException: Unable to find a constructor to use for type OrchardCore.Security.Permissions.Permission. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path '[0].MenuItems[9].Permissions[0].name'.