Extrinsic 7691-1

{
  "heartbeat": {
    "blockNumber": 7689,
    "sessionIndex": 128,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x70ad771691fd71b4f994bca1613d90d7c2e2d262d5ea3dc4bf2d9086a7b8dd3047f151c450fe7f993d846f75fc835d8c7990876928327c93e98a9ebcc12c008e"
}