Does it support dictionaries

[AbdullahShafqat-OG]

I have a API response as such

and I wrote up such a class to handle its request into custom data format

[Serializable]
public class GetLeaderboardDataPost
{
    public string msg_code;
    public string msg;
    public Data data;

    [Serializable]
    public class Data
    {
        public Dictionary<string, Guild> guilds;
    }

    [Serializable]
    public class Guild
    {
        public string total_xp;
        public Dictionary<string, GeniusData> genius_data;
    }

    [Serializable]
    public class GeniusData
    {
        public string username;
        public string title;
        public string level;
        public string xp;
        public Dictionary<string, ItemInfo> items;
    }

    [Serializable]
    public class ItemInfo
    {
        public string name;
        public bool equipped;
    }

    public override string ToString()
    {
        return UnityEngine.JsonUtility.ToJson(this, true);
    }
}

it does not fill up the class properly, are dictionaries not supported or am I going about this wrong ?