Extrinsic 19329-1

{
  "heartbeat": {
    "blockNumber": 19328,
    "sessionIndex": 322,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xac2d27075dc7c7718ea71cf584aec4625621279ef5b4acc7aa305dfba07dda635e008a0adf29e664e0a3572cc2b726f8bd8ac233aed36e5aa3c517223cfead8a"
}