Extrinsic 41322-1

{
  "heartbeat": {
    "blockNumber": 41321,
    "sessionIndex": 688,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5684dbfadd7020986945699be3fe67b67b2c33b0c3fed35a165f8d47af9011482fcfdaf268de35f07fa8039d52d872f686797294c470fff594432c5b5190c188"
}