Extrinsic 45875-1

{
  "heartbeat": {
    "blockNumber": 45873,
    "sessionIndex": 764,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x04ab1e788d1a8dba30311da6096a62e0ff3fdb5c2b1cadd82b58d3912531322e0560d27a4a60e68492f573359924ca218819629a255b8de789e4eff3bc0d998c"
}