Extrinsic 24500-1

{
  "heartbeat": {
    "blockNumber": 24498,
    "sessionIndex": 408,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x4eb692c2a49fa945d36aa4c49ccc106dcc4b292812ea7931bd1a41f6d28df515d048bde15a1a3a290bf2b086fef366884ae5e4a2b6b470404621321a500e8787"
}