Extrinsic 18885-1

{
  "heartbeat": {
    "blockNumber": 18884,
    "sessionIndex": 314,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xbee571fffb027ee847bfe6aa5572d0d21fb638817d39e0f45daef3fab71b9c6b46f7369b2aab1c6fd46d4dc50ec3e660a951c517cc8f9de68cd6c6079f474d80"
}