{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1453939",
    "entityType": "User",
    "nonce": "0xbfb51360abb68946036a2e76461248791bfea343f078f805cbfa886bc0c7caca",
    "signature": "0xa3dc5cbda6261dd48d5c9a60b399f193732612c855c0e22a1356b23d3cb215756adee9eadb5493e088d18efee40c18f9ec301db01d363879b76616239294863a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}