What is jay-z nephew passed away?

As an AI language model, I do not have up-to-date information on such events unless shared on public news platforms. Thus, I cannot provide current details concerning Jay-Z's nephew's passing. However, in 2017, Jay-Z's nephew, Nahmir, died at the young age of 11 due to cancer. Jay-Z dedicated a touching tribute to him in his song "Smile," which expressed his grief and his desire for a cure for the disease.