Extrinsic 31216-1

{
  "heartbeat": {
    "blockNumber": 31215,
    "sessionIndex": 520,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x928204ab2a7311e43973d69817acaa67fc2e25ef0b868c36b0de93f6fe60601e006782c208a019d3d3f6e7dce53d5da5f2689805b5fc44b2d4effb87f1473480"
}