{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x8ed8445713204d6ac8c9b24de91e76bd5ebaf17ba188bd60def59d0daaeabc5c",
    "signature": "0x1ca819cd61b01145414df9030349e86208e07d5b50996988f4f98bbd70b432ab1d2663a444d25c454e4bc58ebc7316dede0f4a37489840942bbdaec1938ad44a1b",
    "signer": "0x635a32c502d056dd6e3f4aC1eb15Fb0d90a88171",
    "userId": "1640466"
  }
}