A Subscriber can be accounting on secreterial practice or a Company. The Subscriber is responsible for placing orders and payments. Subscriber controls list of users and their access previleges.
A entity is a company that needs to file its financial statement in XBLR format. A subscriber can set up more than one entity.
A user is an employee of the subscriber. A subscriber can set up seven/user accounts; and define the entites each user can work on.
A job is an order on DataTracks for the conversion of one Entity's financial statement for one year into XBLR format.