Extrinsic 39743-1

{
  "heartbeat": {
    "blockNumber": 39742,
    "sessionIndex": 662,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x0a47193fdca470b953ee868ec1e7396a414299e1a23ad94046a675171f48954835cecba5f19e6bceaa8f7c9dc2c4d0bcb2077493b668ccc2364810d60a3f2a86"
}