Extrinsic 22521-1

{
  "heartbeat": {
    "blockNumber": 22519,
    "sessionIndex": 375,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xe43f23a7a14c358d593fcb09b44822e9eafc2080e7bb6b4ebe76d0283a391c6afc6cf6785dfb615908608fb133b1861dfd5fbceef3f9e5cfdf474b6fec367e87"
}