Extrinsic 38506-1

{
  "heartbeat": {
    "blockNumber": 38505,
    "sessionIndex": 641,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x7eb72e065ffb8d62706e7ad3369f53c5efa43b9e2b6402041c6092d5058c025bcd7033dc3caa3a0d14e420855d0ee7abfc987441e6450138e06ef0c18dcb5384"
}