Extrinsic 20835-1

{
  "heartbeat": {
    "blockNumber": 20833,
    "sessionIndex": 347,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xcc63d4b74377956f7246f8de8cd2b98e5ac38d29a83641b96341a028c67b8778d81ab75f9d7b14640d4a68f36463c23d71b9f1b6c9198d58622db69edbeea881"
}