Extrinsic 17289-1

{
  "heartbeat": {
    "blockNumber": 17288,
    "sessionIndex": 288,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x2643d5100edf7bc5424611da08a1706c39d4052515697dc11a2703b74990e64adf2e6173884e2b875a6743178c1d6a321d67550bbef3f5572d79670adfba308d"
}