Extrinsic 17808-1

{
  "heartbeat": {
    "blockNumber": 17807,
    "sessionIndex": 296,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x1a5fe8c01cf4c6207ae4b200dfcea9b9ac07e62d5a9f3d9a305992edbe577858c4963ccad227769090154954a2d767b21c805f24afe184b12fab5c24c1fb1288"
}