{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x124208a2ecf3ed8ac759f85b74ac3395835bb7c7e94db22687a77b09591a29f9",
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    "signer": "0xd80624096Af144B7Eba218879A84D12cFf264988",
    "userId": "746744110"
  }
}