diff --git a/Interfaces.md b/Interfaces.md
index 29e85de..65f0d30 100644
--- a/Interfaces.md
+++ b/Interfaces.md
@@ -11,11 +11,9 @@ ggs_vm_runner:user_command(GameVM, User, Command, Args) -> ok
 handle_cast(stop, State) -> {stop, normal, State}
 handle_cast({server, hello, Headers}, State) -> {noreply, NewState}
 handle_cast({server, define, Headers, Data}, State) -> {noreply, NewState}
-handle_cast({game, command, Headers, Data}, State) -> {noreply, NewState}</pre>
+handle_cast({game, Command, Headers, Data}, State) -> {noreply, NewState}</pre>
+
+- `Headers` are a proplist [[http://www.erlang.org/doc/man/proplists.html]] so you can use proplist:get_value(token) to get the value of the header "Token".
+- `Data` is just a String.
+- `Command` is just a String.
 
-Headers is Build like:
-<pre>Headers = {
- token, "FDB59E46-07A2-40B0-B4DB-F3447F0E651B",
- size, 20,
- user_agent, "FunnyGame 2.2"
-}</pre>
\ No newline at end of file