{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512764",
    "entityType": "User",
    "nonce": "0x8621ead6a76a2d9cbdb5c2c48e4d8fdc558231b1e16504177b85d7cea942a6e2",
    "signature": "0xcb8fa2405e1a9f24533e09b999a64a309d5e4a7220258736ff9ca5c1431d0a6a70d0665b1c6bfa0281a753957b7b164f52c0f7d69bce626676f4f735bf0954011c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}