Extrinsic 6948-1

{
  "heartbeat": {
    "blockNumber": 6947,
    "sessionIndex": 115,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x22018aebae301015ba3c7dd15c5f1a44a5b7b32698321aed9e622c710f98ef0981a677b0862f0aeea4ac3fd697fc8f319684daefb843b59d8dd87534bda53080"
}