Extrinsic 16226-1

{
  "heartbeat": {
    "blockNumber": 16224,
    "sessionIndex": 270,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x889f33d763b8eb4291f1b28a466a0c212cfeec78d159d4a57befec8c1c2c6434eb184e807df2fc66b7aec9cadc4786fad10f72e286fc5e0f84dc4dc29d430b89"
}