Extrinsic 38680-1

{
  "heartbeat": {
    "blockNumber": 38678,
    "sessionIndex": 644,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x9e347fe2d103e0e4025040bbbae7e51789a1367eb15e8e75a956b2f1c55b196bd905e4d484dc9165682b5235cdb589fc17958a3c9b0dfbadd442644648b49281"
}