Extrinsic 4597-1

{
  "heartbeat": {
    "blockNumber": 4595,
    "sessionIndex": 76,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xa28881c06b775864887fb05c74f282429d954fdc7435ab28404b86ae402c073ced53209b35434b16792f63a88c2cc995c9dd843c7829c3d90fd298710d276081"
}