// move the socket
sudo mv /var/run/docker.sock /var/run/docker.sock.original

// redirect all socket communications to a tcp listener in port 1234
sudo socat TCP-LISTEN:1234,reuseaddr,fork UNIX-CONNECT:/var/run/docker.sock.original

// create a new proxy socket to be use by the application
sudo socat UNIX-LISTEN:/var/run/docker.sock,fork TCP-CONNECT:127.0.0.1:1234

// sniff the traffic
sudo tcpdump -i lo -netvv port 1234