Extrinsic 13459-1

{
  "heartbeat": {
    "blockNumber": 13457,
    "sessionIndex": 224,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xa444576045d76df65c7663ddb9df08358a887defa707103418f1fb10daf7f46ba65879fd3f6fabe068f74c277e6d2b60c6c275901a8b09e2d0793b18014de683"
}