{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xafa3c43b2b02fd7ffc87c3c03178e033bdee9d5e12ebcdd961060786d2745398",
    "signature": "0xee54bf7a0fc1780717e34dabd71cc3fc82d0af8cb14cec911d9b9daa8c47bcbf7d7fd55288059316eee21325448549a7dc5ee6da44e41c1ea610ba148c6785a01c",
    "signer": "0xf9B2e6c4AD8D7302B8CD57332e90D0C18d7C1522",
    "userId": "552421234"
  }
}