{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1385998271",
    "entityType": "Event",
    "nonce": "0xcdb8a71c4fd1891d8963d98eb2bf0a8427730d6fa02890393220a54818cc1f75",
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    "signer": "0x3939e302479fE0F42271820cd8E0b44A47273209",
    "userId": "540529323"
  }
}