Extrinsic 40688-1

{
  "heartbeat": {
    "blockNumber": 40686,
    "sessionIndex": 678,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xfc52cffbeef75f357fa9b5bfd49ee2d903d59c69ea42a623f2c789dc9c13cd6cf736ba2a949b93c91b35aab71277a884fbbe95d9ab7ee1a579dbe71a2e307e8c"
}