I think, Liverpool management will look for way to increase Mane salary to 120k pounds because Mane has done well for Liverpool team. It will be difficult for Liverpool management to allow Mane to leave Liverpool to another team because Mane mean so much to Liverpool that will make the management to do everything possible to make Mane happy.
IMO, if asked about the player most likely to stay at Liverpool between Mane and Salah, i'd say Salah. Regardless of Mane's performance both for country and club this year and his important goals for the club in important games, he hasn't gotten enough recognition that he deserves.
He won the AFCON for his country Senegal, the first in their history and also World cup qualification, he also has been instrumental to Liverpool's Champion's League performance as well as performance in the EPL, this season...If Liverpool wins the UCL, Mane should also be amongst one of the candidate or nominee's for Ballon D'or this year, he has done a lot.
At this point, he is a hotcake in England, if Liverpool do not do the needful... another club may entice him with a salary currently better that what he receives.