Extrinsic 189551-1

{
  "heartbeat": {
    "blockNumber": 189549,
    "sessionIndex": 3159,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x48d704ec349fedfd1de7af0bb3f3def3f751ef5105a218befa882260ae82f3628754069eec2179adb3a9cecd68478fccc9df3496e87b8e0467b42a2fa313c289"
}