Extrinsic 13239-1

{
  "heartbeat": {
    "blockNumber": 13237,
    "sessionIndex": 220,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xf43c16002ab9d76bdbd9fcef4f918120fac5480c02d9fe69d3b64d60117af379f75f8b81f20b837c0e996a3ee28ac6ff4a5e6ea6f135c5b77977c69a216df88d"
}