Extrinsic 172749-1

{
  "heartbeat": {
    "blockNumber": 172747,
    "sessionIndex": 2879,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xca24c885058e8fdb1a30abf034467b16c756751fd46781330ca83d551577451f52d48286f4aa966462e7fa2f9bcfcfe531edc401f8f43f71d33252b2493fb485"
}