Extrinsic 2349-1

{
  "heartbeat": {
    "blockNumber": 2348,
    "sessionIndex": 39,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x688e30757291af946092d7c9632d1c1618ef34223198fb8d1eb8b575daa48d18396edd0b52922cf4c7025db23d7936e655e8124883923bc7d08f412ad7429c8d"
}