{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x7e2f1b386bc6dfbc7a71bcc9cc6f57c2720211a6d6dee76cbd9d59f52328c85e",
    "signature": "0xc983f0b5c68359be707ae32bd1f3f2d4171f8e1098d75566f94a73f4b7574cd81d1d2d6069b68f7ae640e94647fba1c4b74eee438d4b9a16c8d2ad5691967f471c",
    "signer": "0xdA4565Aff71E89bd0dD0a76470E7c3B53bDf979d",
    "userId": "450772943"
  }
}