Transaction not yet indexed

521SAKm3daETRWt7YPbEiUPBN6vMQCHqa6XrBWCJAeDvh5mggC3m1LeSU2DbGmRevsrR4hBqqRmcJ7TGCED9pp2P

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