Extrinsic 23477-2

{
  "heartbeat": {
    "blockNumber": 23476,
    "sessionIndex": 391,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x7a552844e449faa3fdb959bae6c74408dba9e122a1a5ea24ce70369cd3899d188c9e7e0605b8488d70c26b75904ba51a3c478ec928e67e7de522f7b978d13a80"
}