fictionalize

To retell (something) real (e.g., an event or series of events) as if it were fiction; especially, to do so in a way that departs from reality in any extent from mild to extensive (from minor details to essential substance).

a lightly fictionalized account of [X]

To retell (something) real (e.g., an event or series of events) as if it were fiction; especially, to do so in a way that departs from reality in any extent from mild to extensive (from minor details to essential substance).