Extrinsic 7480-1

{
  "heartbeat": {
    "blockNumber": 7479,
    "sessionIndex": 124,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x624d1c760cfa17edb9c8dd2243263ffcf24b916c7238c9d1c0179a80083d690d6c2ef330ab9593b55a7d804c00b9765d5b6dab869027567a7beca010d3883b89"
}