Extrinsic 7357-1

{
  "heartbeat": {
    "blockNumber": 7356,
    "sessionIndex": 122,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7c8ed866b367628fbc9eb6721fe59a0410fe8e7e229f06893dbfcaf6c39bb40bbd51496dfff152839bc1743afe00b5450ff22b35054f4417c6fe197b2b207281"
}