Transaction not yet indexed

521AEZzpQMTDecFqQViN2pJgtMyTjtH1S6ARDt9i2Wz32Uyv2RqFgkLNXP39p1qATXDd7LTaL5vhsYQQYFduK6fZ

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