Extrinsic 561-1

{
  "heartbeat": {
    "blockNumber": 560,
    "sessionIndex": 9,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xa2111594374e060425663656a49fe3732ccd1822ca35a97d1bd4ce15308aaa6fed9d2e8417f0477810d287de13d92e2c810dcc1377d973687678e7cb11c1278a"
}