{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781841071",
    "entityType": "User",
    "nonce": "0x9ccdae0d567c018c652bb5c840392234456cd8b79b227a2b8f474b40716b4f8d",
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    "signer": "0xC75a276D0a36850045510B0483E737bCDd1F5E9b",
    "userId": "588125677"
  }
}