{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816679716",
    "entityType": "User",
    "nonce": "0x7f4fb37e1bd117abce01e6fa17ed0cc8e82482e5b5355e7d563069fc9882edd6",
    "signature": "0xbbec4188bc464bec40bb23e083eeb843f9fea18b6a4700eaa4a3edfb3ea52f3a340adc09438679fa28498e010c622a4845e99bfa9aa39b5387cabeb915280b5b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}