Extrinsic 40666-1

{
  "heartbeat": {
    "blockNumber": 40664,
    "sessionIndex": 677,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x8600bfe99d33593f6ce136af360fdb141ce3425cef07a5053807be4511476100466ffdab46f7263ba693eb07efb93a8c01349efd730bbc91aaa7b8bb5c7efa8f"
}