Extrinsic 45454-1

{
  "heartbeat": {
    "blockNumber": 45452,
    "sessionIndex": 757,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc029c71ae30f7cc18c21a3339c45e2c29ddd4762f9541e0e8d20ded33653c011220ddcbaf117f5bca8a0580ba0c1a4ccb7f3768fb42c3496acd69d02ca857b80"
}