Beyoncé and Jay-Z’s “Everything Is Love,” for which she wrote songs, had just won Best Urban Contemporary Album.“At that time I could have never imagined that anything I wrote would win a Grammy,” Nija, now 23 and known by her first name, told The Post. “I was just over the moon about it.”Once she arrived at the ceremony, Nija got a second chance to watch her own history in the making when Cardi B’s debut smash, “Invasion of Privacy,” took Best Rap album.