{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "364458",
    "entityType": "User",
    "nonce": "0xcae07c16b3872c3deaa07802a636e3034ff1610e5b83de3b73d2b8b115dbd226",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}