Extrinsic 75458-1

{
  "heartbeat": {
    "blockNumber": 75457,
    "sessionIndex": 1257,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xcc298f3e6a42929388507c32f007497e333ab6280e242acb2f57e4533cf20862979ce465475005cd1b045b23fc964a7bfcc6ce23a08a9063b58f443aa40d4e88"
}