spacerace/Assets/Src/PlayerData.cs

using System;
using System.IO;

using UnityEngine;

using Newtonsoft.Json;

public class PlayerData {
    public PlayerSettings   Settings = new();
    public Guid             Id = Guid.NewGuid();
}

public class PlayerSettings {
    public float    ViewSens = 1.0f;
    public bool     InvertY = false;
}

public static class PlayerDataService {
    static string storagePath = Path.Combine(Application.persistentDataPath, "playerData.json");

    static PlayerDataService() {
        Load();
    }

    public static PlayerData Persist(PlayerData data) {
        Debug.Log(JsonConvert.SerializeObject(data));
        File.WriteAllText(storagePath, JsonConvert.SerializeObject(data));
        return data;
    }

    public static PlayerData Create() {
        PlayerData data = new PlayerData { Id = Guid.NewGuid() };
        return Persist(data);
    }

    public static PlayerData Load() {
        try {
            string json = File.ReadAllText(storagePath);
            PlayerData data = JsonConvert.DeserializeObject<PlayerData>(json);
            Debug.Log($"Loaded player data {json}");

            if (data.Settings == null) data.Settings = new();

            return Persist(data);
        } catch {
            Debug.Log("No existing playerData.json");
            return Create();
        }
    }
}