{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "556",
    "entityType": "User",
    "nonce": "0xcb84e7bf72f9bb23841796e96a2582ec8655966337805660f2eb2fc38d8988b6",
    "signature": "0x3a23b2012111d8bc47d77e4da566a5e0b0c50e6d3678b6ed62f7858448135a15115d40e42a72871e98524f9dc053023850313d1587526b0fddda8364bc8d000d1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}