Extrinsic 341-1

{
  "heartbeat": {
    "blockNumber": 340,
    "sessionIndex": 5,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9e71333cc405e1a2014dfb1cad2f14afc28ff9b5000a9bc5601d76e87d09eb5050a28a47de804c46ee8cdc65c30a9b32190cb01db1acc708378983bdf1c26c85"
}