Extrinsic 13120-1

{
  "heartbeat": {
    "blockNumber": 13118,
    "sessionIndex": 218,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xe07781ce45969cf1f12099743fab65b027a111e81be85f13e0acb86899a8e9206613c022efe4ff7a05a2de1142900a03b1abddb6264ad82f06a4875b34ae388f"
}