Extrinsic 17139-1

{
  "heartbeat": {
    "blockNumber": 17137,
    "sessionIndex": 285,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x5899211edb7099b6b7891d856128e2dc33b66458638cf24c56b7848d70024948be4dbfd5780803178ecd5f57830dd2b20b1cafde9a3addda39d9013c3a478c8b"
}