Extrinsic 38710-1

{
  "heartbeat": {
    "blockNumber": 38709,
    "sessionIndex": 645,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x0ec888474b8fb05c17c1048a179dc8bc6ee0daaef1184a17fa74d1a16ec4ae09efa9307552a8fc7620e9baa5ea77c350e60ad98958aa024b720d3fc5c632f18a"
}