Extrinsic 6848-1

{
  "heartbeat": {
    "blockNumber": 6846,
    "sessionIndex": 114,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xaa5644586d9f98477f85bc7f5e7e8c7e46948b23736b843f7836f5a7fde655633fd8530188e481899494c6cfb886f1a83f0da793aed4fe526d5abf9436d0918d"
}