Example.cs

using UnityEngine;

public class Example : MonoBehaviour
{
    private JsonData m_jsonData;
}

JsonData.cs

using System;
using UnityEngine;

[Serializable]
public sealed class JsonData : ISerializationCallbackReceiver
{
    void ISerializationCallbackReceiver.OnBeforeSerialize()
    {
        Debug.Log( "OnBeforeSerialize");
    }

    void ISerializationCallbackReceiver.OnAfterDeserialize()
    {
        Debug.Log( "OnAfterDeserialize");
        
        // ここで例外が発生
        if ( Application.isPlaying )
        {
        }
    }
}