{
  "type": "unslot",
  "description": "from a key_slot, successfully derive the msg_key",
  "input": {
    "key_slot": "MIVQFqZXFgADW9tvTcWXDCdm90enpy8TSxKybQ4qxGI=",
    "feed_id": "AAAew3905XdfryUoCZkgP4rowDkrzzyxBPDH/ZtIDMzUzw==",
    "prev_msg_id": "AQANw92HovBPgaGzVh6+9M9KvwZXoLYm5c4n0OOtiOP5/w==",
    "recipient": {
      "key": "TMeIncVj/YECjSSthZjfD7OFWonqYR2nPXKacfbE3ck=",
      "scheme": "symmetic-group-shared-key-for-example"
    }
  },
  "output": {
    "msg_key": "YXVQ/8mmtabyajATK8tNbrq7q8L9Q7ecYU+9JB8Zebg="
  },
  "error_code": null
}