Evnet Manager1

using System;
using System.Collections.Generic;

public static class EventBus
{
    private static readonly Dictionary<Type, Delegate> events = new Dictionary<Type, Delegate>();

    public static void Subscribe<T>(Action<T> listener)
    {
        if (events.TryGetValue(typeof(T), out var del))
            events[typeof(T)] = (Action<T>)del + listener;
        else
            events[typeof(T)] = listener;
    }

    public static void Unsubscribe<T>(Action<T> listener)
    {
        if (!events.TryGetValue(typeof(T), out var del)) return;

        var current = (Action<T>)del - listener;
        if (current == null)
            events.Remove(typeof(T));
        else
            events[typeof(T)] = current;
    }

    public static void Publish<T>(T evt)
    {
        if (events.TryGetValue(typeof(T), out var del))
            ((Action<T>)del)?.Invoke(evt);
    }
}

public class PlayerScoredEvent
{
    public int Score { get; private set; }

    public PlayerScoredEvent(int score)
    {
        Score = score;
    }
}

using UnityEngine;

public class ScoreManager : MonoBehaviour
{
    void OnEnable()
    {
        EventBus.Subscribe<PlayerScoredEvent>(OnPlayerScored);
    }

    void OnDisable()
    {
        EventBus.Unsubscribe<PlayerScoredEvent>(OnPlayerScored);
    }

    void OnPlayerScored(PlayerScoredEvent e)
    {
        Debug.Log("Score: " + e.Score);
    }
}

EventBus.Publish(new PlayerScoredEvent(10));