Can I ‘manage’ if I don’t ‘own’

An entrepreneur is “a person who organises and manages any enterprise, especially a business, usually with considerable initiative and risk.” If I follow this definition, I can call myself an ‘entrepreneur’. Only problem is that I don’t ‘own’ the enterprise I manage, or have managed so far.

The question, however, is - can I ‘manage’ something if I don’t ‘own’ it?