{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "57489",
    "entityType": "User",
    "nonce": "0x99925437b4f5696e6b67c4b4cb44ac5f3e626e6eb68c4f74393f75af93bfd6dd",
    "signature": "0x413733084499c4c8c1a6902838afa59488cd297d4b47135c4e4111aca46f351b5f6df0005586be5e8a715eb3a7b526259914abb6048648133356fd5795a927e31c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}