Extrinsic 6527-1

{
  "heartbeat": {
    "blockNumber": 6526,
    "sessionIndex": 108,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x62c389d89988180fec8be460d813d184c86d5a3465ae32e0fca4d0180fd1185565c73b7d8e9765aeb26edb8de593a4fdfc802c51ed124ef698e3e7b974cdc688"
}