{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "447853505",
    "entityType": "User",
    "nonce": "0x51f58776af3d9e96191ebd614ca76b5717877f681ebe96a567e6a48daf0c7147",
    "signature": "0xe5729167d4f1a8a870aa7bc182d09191a995909dcda1b9defa5cda8cdc65edf6664daccbceac3716b5ab6506bb16652165c4e209f6fd3514b5d46867fdf347941c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}