Transaction not yet indexed

521JSMCNj2EYCYvJznGmcDJH4RokhcR61TvRZwZEXvMvur5miThw8xZrxeMCFtFE6RkFcNEnCGByGeXz2QGaXHBi

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.