{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x59e73e01b0b7f8e73ca72695cba3923ac5fd3114712e09f1539fcc89b33b6129",
    "signature": "0x70f90b9812135df497d8dcdaa2486802f7d7007f04010e2b1e8f79c9bd4c84293887489ab051f22ac22476d8f047420975ff692fd3e71b23d3ceb3234e7411e41c",
    "signer": "0x6AD8A511f55a98F773afb33eC22747a76AD9c2D6",
    "userId": "915337571"
  }
}