{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335196",
    "entityType": "User",
    "nonce": "0xd7a81dccb869eb548e9f3e7a5ffedf1e3d141299bf82b18b07ec49ac72bf802e",
    "signature": "0x9a446a66f093ea408fd0f00c981ea9972b5355ac6247a7a4729389473fe99d9934f0e6d8d1ae3c9074091020bec17815203e1cd2dfccd9c08980072972724cf91c",
    "signer": "0x16BE3cc7Ee03C75AD10a94fb7234B045D351825c",
    "userId": "66529124"
  }
}