{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "919989208",
    "entityType": "Event",
    "nonce": "0x2fa19e5ff14e861254e91bf730a761de7ffc9c6795984a272b12255e88773114",
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    "signer": "0x18a7B3405E81900d8aF72d98D5f2C54e2C988f9b",
    "userId": "42634173"
  }
}