Json deserialize object array with dynamic property names

Question

I want to deserialize a json object in c# using JsonSerializer.Deserialize of System.Text.Json. The json looks like this:

{"id":10,"authorization_ids":[],"karma_user_ids":[2],"group_ids":{"2":["full"],"4":["read"],"5":["overview"],"7":["change","overview"],"10":["create"]}}

But the property "group_ids" contains objects with dynamic property names that actually correspond to the ID of a group.

{
  2  : {full}
  4  : {read}
  5  : {overview}
  7  : {change, overview}
  10 : {create}
}

Now I want to deserialize group_ids to an object like this:

public class GroupPermission
{
    public int GroupID { get; set; }
    public Permission Permission { get; set; }

    public GroupPermission() { }
}

[Flags]
public enum Permission
{
    full = 1,
    read = 2,
    overview = 4,
    change = 8,
    create = 16
}

Is this possible? Can someone point me the right direction?

Regards

Answer 1

Should be something like this:

    public class RootObject
    {
        [JsonPropertyName("id")]
        public int Id {get;set;}

        [JsonPropertyName("authorization_ids")]
        public List<int> AuthorizationIds {get;set;}
        
        [JsonPropertyName("karma_user_ids")]
        public List<int> KarmaUserIds {get;set;}

        [JsonPropertyName("group_ids")]
        public Dictionary<int, List<string>> GroupIds {get;set;}

        public RootObject()
        {
            AuthorizationIds = new List<int>();
            KarmaUserIds = new List<int>();
            GroupIds = new Dictionary<int, List<string>>();
        }
    }

To test it:

public static void Main(string[] args)
{
    var json = File.ReadAllText("./file.json");
    var objs = JsonSerializer.Deserialize<RootObject>(json);
}