Private keys are 256 bits (32-bytes) long, according to bitcoin wiki: https://en.bitcoin.it/wiki/Private_key
Diamond Circle, an Australian startup, sent me a pair of bitcoin address and its private key. Blockchain.info shows that the money is still in the given address.
The problem is that the private key is 64-bytes long. It's base-64 encoded evident by the trailing ==
Since it's not in WIF, I wonder how to import it. Has anyone seen 64bit private keys before?