Extrinsic 3944-1

{
  "heartbeat": {
    "blockNumber": 3943,
    "sessionIndex": 65,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9a50cc92d1fb64296bdb4e30bb5aa0746a8ed721eec7784c734f4b1b46496038fc2520dade56c575b15d06a7a5279fc9498dd5e29d56ceaa31cc2241ec515188"
}