JOHANNESBURG — An amapiano track played across the nation on Thursday entered its 18th hour before a single word was sung, and listeners report they are prepared to wait longer. The song, comprising a log drum, a patient shaker, and an implied promise, has so far delivered neither chorus nor verse. A vocalist is understood to be present in the studio, standing by. Analysts confirm the drop is coming, though not when. Dancers have already committed. Some began moving at the 40-second mark and have no plans to stop. The first word, when it arrived, was "ey."