Extrinsic 16996-1

{
  "heartbeat": {
    "blockNumber": 16995,
    "sessionIndex": 283,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7239b890cc2f1fa3246017fa936ba804fa9a85ab411fa8ae1c4f28fc941a957ebfc22eaad772f0350b4ffc30e19b6cf1cb3ce866def2b1afa8899d721b741d83"
}