Extrinsic 1725-1

{
  "heartbeat": {
    "blockNumber": 1724,
    "sessionIndex": 28,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x4ea5e80ae8087cb8452536e2e21b785677e643862f674acde0f79e3c300e460cee9fe1a6c75e558b7b049067c8278a943397af141bec0dc80dd0a90b43de8485"
}