{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x20004d6b1de411fda64931cfc089f29fcebf9ed3f2844126cfe108b0329ffb70",
    "signature": "0x3f00ff386350a6e0a7c9d76c29b6446ae85e81698d51c518d032232612bd01627b194c3515c47261fd2a6dab6d6663c61a1885693a7b74d60e754e86ffc1d60f1b",
    "signer": "0x3CE226b3CA677B312E9396cc48d4008c70545091",
    "userId": "550328673"
  }
}