Extrinsic 2670-1

{
  "heartbeat": {
    "blockNumber": 2669,
    "sessionIndex": 44,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x3e582270ee9247b9fc34d92ac1b142b0fe740d76d878e1f46a746f7b6d6fd406bfc91bb45d1a8217b96b3a58ee89f0917562556c267e784b79ca21988e179a8e"
}