{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123497",
    "entityType": "User",
    "nonce": "0xd949ed0211cc8f99b47488924e554bcd51b2c37d1057473e3c1378ece6bb19af",
    "signature": "0xdf45c0b3eb2763123148152a57fdf70e4ab39048e265e73d57bdb5b36bb4a6735b00df931e52cb10f289328ddd71e56b6aa8aadeed8cbf240536859a7eea5d7c1b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}