Extrinsic 28277-1

{
  "heartbeat": {
    "blockNumber": 28275,
    "sessionIndex": 471,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa80b52afefbedf62e4026e99c3cc7be46ad787891ac3a434c519cae55feb786f3cf19b8e358efd50e5834d73d13b82b69a0d43427d38277ed7d98461624ee884"
}