Extrinsic 173847-2

{
  "heartbeat": {
    "blockNumber": 173846,
    "sessionIndex": 2897,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x1e33f5e0e244a16fb3cbc90ac2eab810cd677648686b60ede5129eeb50475458659997a7e8371a46f8ff4dc11fdac6fbc7bb649a6c20819a191c670a4f8e3480"
}