Extrinsic 1370-1

{
  "heartbeat": {
    "blockNumber": 1367,
    "sessionIndex": 22,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xf2c3f73ac2a89896391e673fcda6ae284bb6d936b5f81e2ee8926187bd633d19c415fc12d78e28d4c3b2806ad6cf24a6be880bf987b80231f72aa1e91db08789"
}