{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508404",
    "entityType": "User",
    "nonce": "0x95138888c290037e3677051a6068a039ffb0e86a6c1f02438285f07c35cb4e9a",
    "signature": "0xbd5013c01db0653d4cae3c7727047cfd4e3f77e0fe66491d679f8064cfda7cbc2764c76eb1dfa0bf98a4491c2c702b5765a1788dd6cfb809218ccb92a931dea41b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}