Extrinsic 6750-1

{
  "heartbeat": {
    "blockNumber": 6749,
    "sessionIndex": 112,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xecf6c0cf54e34f4f22d37d52585ad5403e7b3c6f9e016c06a8bd3576dbd2d435c1fc64b1fe7e537df327441702f67f0a9f207566965b5909c3853dded8f31d8e"
}