{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3cd90a1cdb3ff21613218b44b9f98ed984fbfe2aee3ca123fbe4d74d1c563621",
    "signature": "0x81370fcaabb9b8c0cf315bedb8c4345b254e9a8a9f9be7513fedc1e5057e41d1760ab0fde8d79ea8eea1d8758c8b2e6c1d51f93d7b9ce9bb5a3482d6af3629571b",
    "signer": "0x1dd83C37911b724dd6767d8bf53608d44D963246",
    "userId": "225208229"
  }
}