Code analysis in il2cpp game

There is a game where people chat in rooms. I analyzed the packages that the game sends and there is always a value at the end of the package that I can't figure out what it is.

What I want to do: I want to understand and be able to replicate my own packages to perform actions in the game like changing clothes, sending messages, etc. But I just need you to figure it out and show me how The end of the package is generated, I already know the rest of the package, just not the end

What I know about the packages: this ending that I want to know how it is generated, always changes, in every package, and it doesn't seem like something incremental

The game has two versions, one is made with Unity for mobile, but there's no point in using tools to try to see the code, it's obfuscated, I've already tried

In the web version the game uses webassembly, it was also made with Unity, but it is much more complex I think to reverse engineer in webassembly

The game uses smartfoxserver to communicate