{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xe403270097bb6ea94f585d71a7757ffc8ebe98a6c884288ca2fb3b4840211dd7",
    "signature": "0x939c8df21500da6ae7b3bbc35575639af5ca746bc1b0581137cc0adb319039125852d577d2ffdcf1a9731ec9f552bf4a5a98c415e3abf5c2c174c463fd9349ef1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}