Send a raw tell command to a player through ProtocolLib.

SendRawTellPacket.java

package com.comphenix.example;

import java.lang.reflect.InvocationTargetException;

import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.wrappers.WrappedChatComponent;

public class SendRawTellPacket extends JavaPlugin implements Listener {    
    // Look at this example for the rest of the syntax:
    //    https://gist.github.com/thinkofdeath/e882ce057ed83bac0a1c
    private static final String MESSAGE = 
        "{" + 
          "\"text\": \"Hello world\"," + 
          "\"clickEvent\": {" + 
            "\"action\":\"run_command\", " + "" +
            "\"value\": \"/time set day\"" + 
          "}" +
        "}";
    
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (sender instanceof Player) {
            Player player = (Player) sender;
            
            PacketContainer chat = new PacketContainer(PacketType.Play.Server.CHAT);
            chat.getChatComponents().write(0, WrappedChatComponent.fromJson(MESSAGE));
            
            try {
                ProtocolLibrary.getProtocolManager().sendServerPacket(player, chat);
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
        }
        return true;
    }
}