Transaction not yet indexed

Nm56aa9yBimVUpUwNfDCAM9PHhAYzboFoKfL2nA4kZkxebPeqZ78PHmf3pVQkq6wc6zzdQdBKvAcehYLJSU8F56

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