{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x43c61bd054edcbd6b1a594abe570c4ba84de7699257231e83dc1efd8ee0ba2e7",
    "signature": "0x25d95cd6cfab20a7e4b4d55ddec8e3cff0526d6225aa3d30a50ac1f37c171b7f6f1d4f4b741bec068dd4b1a5fa36bb8664c70b9d8e1ee8efcbcc10ca361236001c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}