{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300177",
    "entityType": "User",
    "nonce": "0xa9b1f1d8c23d811f119a98d439d8e5735d406b719dbccf72bd4176c83c836491",
    "signature": "0xfce67897d858ca30288b46af8374609ce5ffc603efbec329032f5965161b9147589fe290c81b1484a89d4760c313827ca8877dedd02a7d8e72cf8e44991af2161c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}