Extrinsic 173470-1

{
  "heartbeat": {
    "blockNumber": 173468,
    "sessionIndex": 2891,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x72a4271b36b4563eaa5fcb96d8e004b025bf435eea5290e592f98ef3979daa307b358e87e94a8e03b99310c9ec1bf880faef145d92230e43067d6a017c101982"
}