Extrinsic 39443-1

{
  "heartbeat": {
    "blockNumber": 39441,
    "sessionIndex": 657,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x8ac15064701f758a6aeda268f83b4d69e6c7660b2e7e1af3ad230ba68ae7c445caea3b3c509e089c858a8e93a868f3c474e2fc6fecf4955585a4850f45318a88"
}