Extrinsic 17544-1

{
  "heartbeat": {
    "blockNumber": 17543,
    "sessionIndex": 292,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x164b76d83371679ac95b762e39203b61a61d6500b9401de514da6afee6fd5d4a332634c8035bb36237e14d7e8352f2a5539f0981847bf9ccad5b9c64ff0a6786"
}