Extrinsic 76218-1

{
  "heartbeat": {
    "blockNumber": 76217,
    "sessionIndex": 1270,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xd4538b13f8ae4712992fd133705a90812de52ea3426b18fadab4b468179623574851badf39f96899a11fb8fe238e3f9cbfc9a61ed669f29871301988ae71eb81"
}