Extrinsic 39556-1

{
  "heartbeat": {
    "blockNumber": 39554,
    "sessionIndex": 659,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x8ca3290b8aca6c29f4b90bb90df3006a81803d596fea2107d6b73dcabe9eb8794be9250ab5ff7aad23e93093a6b2c63da1db950f4f579dda039c8d7cbe15428f"
}