Extrinsic 4708-1

{
  "heartbeat": {
    "blockNumber": 4706,
    "sessionIndex": 78,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xf6f45685f5c27764a26097b47a2891bc39abbd9dffe1436f5ecef7108231c55fd2d6951e119b2e61955175fd76836570df82ea9162f736106c6e4fc30cc78685"
}