Extrinsic 7576-1

{
  "heartbeat": {
    "blockNumber": 7575,
    "sessionIndex": 126,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x4a26937219ee134736709e7815f774f6884f4ca26823c4b4255c35892bcc355c8e4a06fcf6a117d20ac82f014f1c4e60d4a06f48bade7375cf1c4ebfc576758d"
}