{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "505890932",
    "entityType": "User",
    "nonce": "0xbc493f874adc3cb853598b20ef2b8e343c5ccb3d2954442743d8e5b1eda7ccf8",
    "signature": "0x5ff9339a9fb0219bdc0452cdccd8b66b2f9c0d8fd0a31cda4563070b09add1ff3b0ef999ca6d02074ee15d5842760076848672ea3a4d1dc7eec7dc39edde33b91c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}