Extrinsic 6866-1

{
  "heartbeat": {
    "blockNumber": 6865,
    "sessionIndex": 114,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x065ff2875cbd10e3f566957ac1b85a7c842cd689f3ab8e3b8e629428a5bc49078fc67337dfe36f160755a512a23600887d4bc25b6e6bbb37d633b48cf2419283"
}