Extrinsic 38724-1

{
  "heartbeat": {
    "blockNumber": 38723,
    "sessionIndex": 645,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x50af17504ab9dfd7cf885fdb43d2e42765c37ded996b9733dabdfae3707bd37be1dccd19b7a317c7703d825e85a27e72d1eaafec68da7d5c10a0d06cfa7e4882"
}