Extrinsic 39688-1

{
  "heartbeat": {
    "blockNumber": 39686,
    "sessionIndex": 661,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc6dbbd9348567075c6e5a8623832c90cb66077d4c12d6e62f90085d02b5592000a8e2d677b2d281073385acc4ab4839060e62340b4f8b668c5e863d327304382"
}