Extrinsic 177326-1

{
  "heartbeat": {
    "blockNumber": 177325,
    "sessionIndex": 2955,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x868302a8a8d582964407a24c9a0419673e2972d1b900db650be15139b4846b7010bd4573cfd40261cdcc8969b00aaa631b818a1d7410f3bfe55776e5c7746c84"
}