{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "43375",
    "entityType": "User",
    "nonce": "0xfd76c13e0d34a7b8e1cc9929b0aecf29dcd1d57b5185985ca7b23dc52b1b880b",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}