Extrinsic 6758-1

{
  "heartbeat": {
    "blockNumber": 6756,
    "sessionIndex": 112,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xb2277249791929b28ea23f40c7d9ebf3edd7c75464fed31e9659e83a58f7aa6d03b5500bd93edff6664249536eb38880c124a4ef66911a9660e7bee3a8303780"
}