Extrinsic 12218-1

{
  "heartbeat": {
    "blockNumber": 12217,
    "sessionIndex": 203,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xc898e7c2f916ed4a43f9ad33670f17f9feccf643f19a5b11c800a4151c16a956c43d8099a559774c67b8c6024ca8971f4fc6a7762a64ebe4e2c4038c700ff888"
}