{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1686476",
    "entityType": "User",
    "nonce": "0x643f136a58e93f3fee29ceb80367d4a57ec2505608dcf90878a6599687b005af",
    "signature": "0xc559590eed630cbc09dcc1aef8682c16fcffeb922326205c524da60c2683bdd862225737c3b8ec1576d7e844b68b4690fdffa62b63538b008b3daa8293d498581b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}