Extrinsic 40171-1

{
  "heartbeat": {
    "blockNumber": 40169,
    "sessionIndex": 669,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x506e07459d436cee692f26a792914525d5db36784a4808dd92051606d0b1a66681eb749f3c01067bb1b759452298b7fd77b82ba9a6b034786d660d0298c3c988"
}