Extrinsic 39911-1

{
  "heartbeat": {
    "blockNumber": 39909,
    "sessionIndex": 665,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xbcec4d2ecca3ebcd14f1ee1d58b8032105ef58e59f1d90f6c795865352630a255a2547ba9b443c42a3db903446a6dad539f53842795026820d97dab32d6bf481"
}