Be professional and don't just do it for the sake of your salary/profit but do it to help the project that you are hired so be responsible.

You can look on how they are making it by visiting different types of threads. Don't try to imitate one, learn to be unique and set your own design.

There are some managers that are also signature designers but others are hiring their own signature designer for the sig code of that campaign/bounty.

If you want to be a good/ideal manager you must follow those examples that are trustworthy and doing their job pretty well.