Extrinsic 48753-1

{
  "heartbeat": {
    "blockNumber": 48752,
    "sessionIndex": 812,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xc81b7a321eebec778c3cc8429ade858099d66712dbf57049d59ec9443a662030525ca2ea5246902deaf3882cb061077de222d6b218a43b8e6a91fc9067ba578a"
}