What RE compensation can qualify as "EARNED INCOME" for Roth IRA

[Matthew Muscarelle]

I understand that things like rent are considered passive income and that sales are considered capital gains, and both are disqualified as qualifying income from which to make Roth IRA contributions. So I need to classify some income as earned income in order to make my annual max contribution to my Roth. I am wondering if JV fees or assignment fees might meet the standard? Or any other ideas? Thanks