{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xf9f8db4a95d8b9d88f1e4c5aab68afa16cb06bb7df2d91d689b5d1641a5d59a4",
    "signature": "0x3e6e82c5f47994b5ddeaafca3a9ac91938d059552181a7f50d9f3330193216491ddf78e66d98ad31bd2ebc654527be8783fae04a8c47af431c7d3cde19e3f7141c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}