Extrinsic 20316-1

{
  "heartbeat": {
    "blockNumber": 20315,
    "sessionIndex": 338,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x4483ea34260470fda28d305124d2d8828a7dc550e669a4d5c5c5c1ce32e59a6f87a3f193c5f402a6c7174d44f7f3e0643becc5ecffeeb1c9e415a93a1284b28a"
}