Node Red payload to SocketIO – Server

I have a socket IO server running on port 3000 using node express:

  io.on("connection", (socket) => {
  console.log(`User ${socket.id} Connected!`);

  socket.on('join-room',function(roomId){
    if(roomId == 'null') return;
    socket.join(roomId)
    console.log(`Joined ${roomId}`)
  })

});

and I have a node-red payload. How can I send my payload to my socketio server? I recently used node-red that’s why I’m familiarizing it. Do you have any tips or suggestion? I want to receive the payload on my socket server. Is that possbile?