Extrinsic 175422-1

{
  "heartbeat": {
    "blockNumber": 175420,
    "sessionIndex": 2923,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xd0b9455f8b7781aacf55e245e4a03e43353fbf033c2511ead428e34a74bb19252810fff739a03e02515ea70a7b8df4c5c983915cdc20e1078d1c0cf05e4fb488"
}