Extrinsic 172669-1

{
  "heartbeat": {
    "blockNumber": 172667,
    "sessionIndex": 2877,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x4c2540bc994f887866da24d9d905061e6ad8979057921137d24db403df88a622cad61d14fd6fd33d4204e080fa97383d0f7bcf7ccab7e6cc9dd8a57a7bd5b28a"
}