{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "669726144",
    "entityType": "User",
    "nonce": "0x8e0ccb5e482ccb77e5d1061ed6a45cb35554023b72cb3e3d39d62a99650042d9",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}