{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x4749ebe73de3f87a9b89cef6088d5e439dc622a8d449033e2f65d4bf48be50ee",
    "signature": "0x3b0d2d40fc51c14fdd0d4e40931f286fd3308481169bcd4812c392ca277e86a618e90ee613fb96e95e4c8b32b934e2c8a4eaecc936786a28a1dfe0bcff5643261b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}