In NJ can I be mandated to work 60 hours per week
Unless scheduling you to work 60 hours per week violates the terms of an employment contract or union agreement, it is legal. The fact is that most work relationships are "at will". This means that a company can set the conditions of employment much as it sees fit (absent some form of legally actionable discrimination). So unfortunately you have no claim here. You'll either have to keep using up your PTO or find another job.