I don't know if you're on thin ice or not, but here are some things that might be helpful to know:
First, average S corp salary is around $40K so given that there are 4 million S corps and given that they audit roughly 10K a year, at $50K there are roughly 2 million small S corps more interesting than you and so more more likely to join the "honored" 10,000 who annually get audited.
Second, while $50K might be a little low in some areas, if you can, you might look at trying to use self-employed health insurance and an employer pension match to create "compensation" that isn't subject to payroll taxes. E.g., if you pay Malum the shareholder-employer a base wage of $50K but then in addition provide $10K of health insurance, that counts as wages but isn't subject to payroll taxes. Not to go all accountant on you, but if you also did a 25% SEP match (so $15K on the $60K of base wages and health insurance) you're now up to $75K in compensation in a sense. But you've still "only" paid payroll taxes on $50K.
Third, you want to see if there's anything you can do to dial down your distributions since that's what IRS can come in and recategorize. Example: If you give $5K a year to charity, your S corp ought to do that (which means your distributions are $5K less).
Hope that helps.
P.S. I think Warren Buffet has in recent years paid himself $100K... (That's a way to explain the $15,300 of FICA taxes he says he paid since the rate is 15.3%)... and that's another good data point to keep in mind.