Leraje is an entity listed in the Ars Goetia. I like Corwin Hargrove’s book “Goetia Pathworking” to contact them, or we have same fave tutorials collected here for free, which includes the instructions on how to do petitions:
Caveat: definitley make sure your spiritual hygiene is on point first, so you don’t end up with parasites or other timewasting things.