Extrinsic 45194-2

{
  "heartbeat": {
    "blockNumber": 45192,
    "sessionIndex": 753,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xca12d8c18b37db58709369dcd3d406679897a9c3f3328685137626845686f23bd3db2e7b856c634207cd8ac1d194393e962767c42458cacf209a5169d9ea6889"
}