OldThink/Content.Client/_White/TTS/TTSManager.cs

using Content.Shared._White.TTS;
using Robust.Shared.Network;

namespace Content.Client._White.TTS;

// ReSharper disable once InconsistentNaming
public sealed class TTSManager
{
    [Dependency] private readonly IClientNetManager _netMgr = default!;
    [Dependency] private readonly EntityManager _entityManager = default!;

    public void Initialize()
    {
        _netMgr.RegisterNetMessage<MsgRequestTTS>();
    }

    // ReSharper disable once InconsistentNaming
    public void RequestTTS(EntityUid uid, string text, string voiceId)
    {
        var netEntity = _entityManager.GetNetEntity(uid);
        var msg = new MsgRequestTTS() { Text = text, Uid = netEntity, VoiceId = voiceId };
        _netMgr.ClientSendMessage(msg);
    }
}