JsonTest.cs

using System;
using System.Collections.Generic;
using UnityEngine;

public class JsonTest : MonoBehaviour
{
	void Start()
	{
		var json = Serialize();
		Desirialize(json);
	}
	
	string Serialize()
	{
		var enemy1 = new Enemy()
		{
			Name = "MonsterA",
			Hp = 10,
			Mp = 5,
		};
		
		var enemy2 = new Enemy()
		{
			Name = "MonsterB",
			Hp = 9,
			Mp = 6,
		};
		
		var enemy3 = new Enemy()
		{
			Name = "MonsterC",
			Hp = 8,
			Mp = 7,
		};
		
		var stage = new Stage()
		{
			StageName = "DummyStage",
			Enemies = new List<Enemy>{ enemy1, enemy2, enemy3 }
		};
		
		return JsonUtility.ToJson(stage);
	}
	
	void Desirialize(string json)
	{
		var stage = JsonUtility.FromJson<Stage>(json);
		Debug.LogFormat("StageName: {0}", stage.StageName);
		foreach(var enemy in stage.Enemies) Debug.LogFormat("Name: {0} | {1}/{2}", enemy.Name, enemy.Hp, enemy.Mp);
	}
}


[Serializable]
public class Stage
{
	public string StageName;
	public List<Enemy> Enemies;
}

[Serializable]
public class Enemy
{
	public string Name;
	public int Hp;
	public int Mp;
}