Extrinsic 39400-1

{
  "heartbeat": {
    "blockNumber": 39398,
    "sessionIndex": 656,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xd864a4b19e76ad305408f42de9fec33b6d752a5047824c85468b3fae470f7c658c82b02a6c108c688b2be8a27d6a46ae5982d5e016fef80c9ab0d9d68d9d9d83"
}