Extrinsic 19607-1

{
  "heartbeat": {
    "blockNumber": 19605,
    "sessionIndex": 326,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x6a9963da84d865370ed49bb0993b88fae738b35e77360e0e89af3fc752ce21050e33e85062cf0a6ee5f24c3ae939faa0f0ca007c32b6bb3453800877b7b31282"
}