Extrinsic 3502-1

{
  "heartbeat": {
    "blockNumber": 3501,
    "sessionIndex": 58,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe6668dbb7ef109e2835e62878161aa6344108b8e2905bc11d21a7f78e36823758645cd2248a8915dc9f08f3a70c61f89b314f608a463aed38ad67c68383da283"
}