The Al Hilal utility completed a loan deal on Monday, keeping him at the Stadium of Light until the end of the current campaign.
Mangane joins Sunderland from Saudi Arabian club Al-Hilal and has been impressed by what he has seen.
"The facilities are amazing and I'm looking forward to getting started," Mangane added.
"It's all very exciting. I'll give 100% for the team and show the fans how passionate I am about playing for the club."