ENTERTAINMENT Jay Z’s ROC Nation Officially Welcomes Tiwa Savage To Their Team (Photo) By Admin - Jul 28, 2016 0 344 FacebookTwitterPinterestWhatsApp Mavins first lady Tiwa Savage has signed with Roc Nation, an American entertainment company founded by rapper Jay Z in 2008. The official Instagram page of the company shared the photo above as they officially welcomed her. *Congrats again..