Jahanbakhsh has been playing for Eredivisie side AZ Alkmaar since joining the club in 2015.
He has made a big impression this season at AZ, scoring 12 goals and 12 assists in 27 games.
The Iranian’s contract in Alkmaar will run until mid-2020, but there is a chance for him to join a better league after the 2018 World Cup in Russia.
Watford, Bournmouth and Celtic had already showed interest in recruiting the winger.
A former Iranian U-20 and U-23 international, Jahanbakhsh has won 34 caps and scored four goals but played only a peripheral part in his country’s 2014 World Cup campaign, coming on as a sub in all three of Iran’s games.