Extrinsic 189440-1

{
  "heartbeat": {
    "blockNumber": 189438,
    "sessionIndex": 3157,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xba16673abc75d583028c8cad232214a2f99c1812d0addb56c148c6905a1ae27cbcb1c51962180a4e03d58896d2478ca361d2166e8db468753b1082113668f38e"
}