{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x64ae92fb5f8fc44ed1dcd86372bde1a1effb21a16e5dae42c68408f266d6f3d0",
    "signature": "0x8fb5b29af95bcabb65954ed23b07a5f8271121fc7b4f0b52c8bb315021599f7e3e1e3b2666469882293f2d65160f8d846c3c81a9c7bb78ed365058b2f1cdc2d91c",
    "signer": "0x359c0073aA18FeB5af105AB505631fc703121Ab9",
    "userId": "800879796"
  }
}