{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "604345463",
    "entityType": "User",
    "nonce": "0x81c75f5aec0c79cd944b81a6e0825e098dc097e9a6eac5525ff7a6deda0776a1",
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    "signer": "0xf75adc45948144ee7d18bD5B4AEf863989CB88E6",
    "userId": "798360139"
  }
}