Extrinsic 138974-1

{
  "heartbeat": {
    "blockNumber": 138972,
    "sessionIndex": 2316,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7afaffd79dfdeda99b648c7f05725244a10b4d0885eeee2c03d24c7edf3ca05a87f2804248869af1ad6f6c649e07dd785b8ac206e1b4c7048144ba2f53c63b84"
}