Extrinsic 12331-1

{
  "heartbeat": {
    "blockNumber": 12329,
    "sessionIndex": 205,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xf698b4c0345ca119ca80e7e541123aab30912f591a8a2a56adf4adcc70e2c6295f64c6d903d0e02876cdebe0bdc0b4341b90442ab1404e387a0b598e06c31688"
}