{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "945818227",
    "entityType": "User",
    "nonce": "0x5f0aead5de2490dcba21fb9756ddad852563f4dce1128a0aaa31488b83c4e55f",
    "signature": "0x9f1560d1304b1febc28b08375c174ff4d03eb1d4bd160f7a5fa3e0b2bbd5112e506e65ed1dce1d317dcdf89cf7a56727328ffe37e504d0aca4808ab18bd0ab9d1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}