Extrinsic 4244-1

{
  "heartbeat": {
    "blockNumber": 4242,
    "sessionIndex": 70,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6a4c95dadf9410fb31a9f0f7cb849ebeef5e233d162e1eb4ff3a1fd2ab701d03a83fe0b34d910140af593716c5cceb4e708bda6fc468142356afdcd9ccb06e83"
}