Extrinsic 12270-1

{
  "heartbeat": {
    "blockNumber": 12268,
    "sessionIndex": 204,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x74f035c132524c74b7ec210b9d9ee929199f90ba19a5220604544a84cf8d244c45b998defc9415e336c7d031f28912261b68ab453b48a8ada0e6ca390b70d78b"
}