Extrinsic 173448-1

{
  "heartbeat": {
    "blockNumber": 173447,
    "sessionIndex": 2890,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x6c4613ab94015d1307ab5fb04032d7169663038c599ff792e9e865fe488aca5653cb95a06e86fd722b36e59c41f25cf8569b99055f26a8a57d2a854530a32e8c"
}