Extrinsic 42-1

{
  "heartbeat": {
    "blockNumber": 41,
    "sessionIndex": 0,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x326c806b8843e8f5d50b12a37165520434405fc097d43534eb7be18f79a45616538f15bff404e5a3da231ee3c3f285a6a4f7c4867765adcf32518e76902c6287"
}