What's the Average Compensation for a Manager?

i looked to expand, and have been sent some possible contracts for managers or management companies. Is there an industry standard for creators to be paying of their total income? Are people basing it off of gross income, or just management acquired income?" We are actually going to have a manager on this show, not just read. So if you got the more questions about managers, specifically, put them on the redit. Allright, what's typical compensation for a management company to take?