Extrinsic 28717-1

{
  "heartbeat": {
    "blockNumber": 28716,
    "sessionIndex": 478,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xbab8d6173c5a0a36f924dfd67e47fb418ce430602c6925851eb62aded64f743b77b862168c4de7aadac143236ce41cadd23b509abebb888f960df76391055382"
}