{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc090777fa0667c032403e300df5e8dad89016868788cdf62e6eb2c2ad16ac20e",
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    "signer": "0xD8a3987Efb79769bA8D452aC9Bd081DF45E48252",
    "userId": "348420823"
  }
}