{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "274010868",
    "entityType": "User",
    "nonce": "0xc243d90ca03444fd3c97123b22ecd77ed5b4bf2e62f721a051c916568f05ee18",
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    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}