enumeratesigners

curl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"enumeratesigners","params":[]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/

{
  "signers": [
    {
      "fingerprint": "d34db33f",
      "name": "Ledger Nano S"
    }
  ]
}