Extrinsic 130231-1

{
  "heartbeat": {
    "blockNumber": 130230,
    "sessionIndex": 2170,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf4df8a35ad262f765e5203bd07508304742f032c4956113cd1710c2caf61834bf936f0c7a30a552bbf72b2530ce58bb1eb5492d48b54c0e6fb4a357d89a4f287"
}