CloudSaveService.Instance.Data.Player.LoadAllAsync()

Hello
I was working on UGS sample that ServerlessMultiPLayer.
I noticed these.

var savedData = await CloudSaveService.Instance.Data.LoadAllAsync();

changed this into

var savedData = await CloudSaveService.Instance.Data.Player.LoadAllAsync();

and i want to get data this way

if (savedData.TryGetValue(k_PlayerStatsKey, out var playerStatsJson))
m_PlayerStats = JsonUtility.FromJson(playerStatsJson.Value.ToString());

But ToString method doesnt work here. It gives "JSON parse error: Invalid value." As i checked value as string is OK.
then i tried this and it worked.

m_PlayerStats = JsonUtility.FromJson(playerStatsJson.Value.GetAsString());