Extrinsic 348-1

{
  "heartbeat": {
    "blockNumber": 347,
    "sessionIndex": 5,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xf0b856f0d51c37362fe1841fd6ba004a376c0b325d2c2c334dceca5bc224da6cee6b415b42b92c249906b96092ed8835ca27711aa0614702804258576a176184"
}