Extrinsic 7669-2

{
  "heartbeat": {
    "blockNumber": 7667,
    "sessionIndex": 127,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x68a0580a9dad7f061490d3bfcd21d91b824377c9bd93e7c218f24de09e22670cc904ab31eea0742f8c05ff7c91854e41dc7fc7281fbb03143385bf7dc66fa789"
}