Transaction not yet indexed

MamNGEF1PgTHupSbVGjp5SfGerpt8Tcd4MNH1Cm8WNZPxM4ywVCZLsQPYGLycjZmFShTAJkAzeTQJLTQN4U4ou8

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