{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "975218744",
    "entityType": "User",
    "nonce": "0x3a7919ba992f4a4f09a3edec3b8546d4072c8d15336b2617fa970e62ffff99ba",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}