The Bruce Springsteen show at MetLife Stadium has one of the more unique field setups for a football-stadium concert. Often times the field is all reserved seating or mostly reserved with a small general admission pit area. For the Springsteen show, the entire field is a general admission area.
There are no seats in any of the general admission areas at MetLife Stadium. Thus, the entire field will be standing, and fans will occupy spaces on a first-come, first-serve basis. Unfortunately, this means you'll have to arrive early to occupy a space close to the stage and that you'll have to stand for the duration of the concert.