Extrinsic 3199-1

{
  "heartbeat": {
    "blockNumber": 3197,
    "sessionIndex": 53,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xded5d14e2f84b3c3908a2475d52feca9af8ee6f80a764eab7cf147be59a23b4292230acbcc19c9138036dc48124e8b77c10a70096bbfca4de668768936e91189"
}