{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8b38aa199f5cec9751f258f774e41d86c0b4ccdd8982853dd0014b550bdf8720",
    "signature": "0xf8b464a1950a90ff1ba5ac3c7b2f3ab6e25aab4740bec046c913b8b16d14dad433967c458c34f7e79ee0ab6d06df28b8376ab6bd5d37db6a4f5d79841ecc9fac1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}