Transaction not yet indexed

1Nb7MmAmJ5MA3M9SziDyLpjCiKyBikhnUrUv8M5LnxusR5Paa8XHBz9JFWLPR28DL2q77omgv1QD6aLHsGgUrCS

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