diff --git a/Interfaces.md b/Interfaces.md
index 7d4130a..29e85de 100644
--- a/Interfaces.md
+++ b/Interfaces.md
@@ -11,4 +11,11 @@ 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>
\ No newline at end of file
+handle_cast({game, command, Headers, Data}, State) -> {noreply, NewState}</pre>
+
+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