Extrinsic 13004-1

{
  "heartbeat": {
    "blockNumber": 13003,
    "sessionIndex": 216,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb40c2ce513b5c33bef8e10524081ba44c0d8dbc82757ce8c3256c6b47cb3fb0fdbd8f7a56f91cc642bdfa5d0d504dc92c599b7cb859fa01de462fac884ca3787"
}