Extrinsic 172354-1

{
  "heartbeat": {
    "blockNumber": 172352,
    "sessionIndex": 2872,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x327fd6781edd2858a8b2a4e444ad0df037b79c0ee3586ff0a061a8cef69d190a5cce80969a63ed75ae8f469a43bf9654ee9254ec582b3b715a950380cbf88a8f"
}