Extrinsic 26919-2

{
  "heartbeat": {
    "blockNumber": 26917,
    "sessionIndex": 448,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x7840b287caf924a61d09ec71205bf9e8a2f33f5d2a65148ad45100e91a2aba3b45dad42388fbc36931a2da90d22363cf85fb81d3625db3ce5756c7db3dc4958a"
}