Extrinsic 22421-1

{
  "heartbeat": {
    "blockNumber": 22420,
    "sessionIndex": 373,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x42a5cdb42df5e1df27e32a37961ce86caecc90b3f3314d0ace2fcd778036d8311bfd9642111d22f59ec884192a9ae29e6b4d2280aa907d0e11cd3f66daa2ac8d"
}