Extrinsic 75510-1

{
  "heartbeat": {
    "blockNumber": 75509,
    "sessionIndex": 1258,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x024da3a95111a8aaf8da8cf1b1faa81962a8e5f3fdbe2dead4df95053b56ea66657fee43f3b258b78a4ab3e391264639e98376039aca2a4ac4dd694d07948b81"
}