Extrinsic 4068-1

{
  "heartbeat": {
    "blockNumber": 4067,
    "sessionIndex": 67,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x5e26f86653af49770dfffeb46cd08534bd606a2e4caf790272b63792a62ecf1047accdebd405cf712dee06ef8e35fc00337f8cfe292f023d8ea2656a9b73dc81"
}