{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "597677270",
    "entityType": "User",
    "nonce": "0xcf7e008c1c4484ef3d1aa486912922758edaa78b4562d189f435e1c88d354621",
    "signature": "0xa4756c532f96f9e47cb1e31a5ce56ec7f2c19347074a67fc9589d3fe6f96a50228f66e0323663f7b274d31b21e41859d96d7d8d840a293d25264782a94a784451c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}