{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "112344",
    "entityType": "User",
    "nonce": "0x588be4c33ffc6b70616de6793acfea1298f650ed8302a8675f786e238bb776a9",
    "signature": "0x303a48f65ce1544704a610090de953139b98f7344ea1e6b7a7639827a1a58385153865f5096d6bfa9a9f09f589d8668beb9d52e8400b87ae0d43aec96d7bc1561b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}