{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x494501b94ecbd2e0716339cb4bec5cc91aa9a524135ec4aaa80b34e91017fbf2",
    "signature": "0x7b47c2c64ab648e1a3f13e70f1a549961905a6afa85589dd0e3d91e6428c3947255e7811cbf1c562d9386a8d6353025aa56e2ac87314352e024fad5cef585cc81b",
    "signer": "0xE176510B4C6a60d098ec2C19394fa2F1F20b3cd3",
    "userId": "103319132"
  }
}