Extrinsic 45458-1

{
  "heartbeat": {
    "blockNumber": 45457,
    "sessionIndex": 757,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x50ded5ff9bdb138be7467e61d345749561851493d13ea3caf6a011dd077f6f744fec0184fd98aa9e718af35065a0b6cf80df54700846e12e3d3ac2402e07fd84"
}