A base class to make a Scriptable Object reset its values after exiting play mode

ResettableScriptableObject.cs

Using UnityEngine;
#if UNITY_EDITOR 
using UnityEditor;
#endif

public class ResettableScriptableObject : ScriptableObject
{
    public int Field1;
    public float Field2;
    public Vector2 Field3;

#if UNITY_EDITOR
    [SerializeField] private bool _revert;
    private string _initialJson = string.Empty;
#endif

    private void OnEnable ( )
    {
#if UNITY_EDITOR
        EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
        EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
#endif
    }

#if UNITY_EDITOR
    private void OnPlayModeStateChanged ( PlayModeStateChange obj )
    {
        switch ( obj )
        {
            case PlayModeStateChange.EnteredPlayMode:
                _initialJson = EditorJsonUtility.ToJson ( this );
                break;

            case PlayModeStateChange.ExitingPlayMode:
                EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
                if ( _revert )
                    EditorJsonUtility.FromJsonOverwrite ( _initialJson, this );
                break;
        }
    }
#endif
}