{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "451684863",
    "entityType": "User",
    "nonce": "0xdcf81d07999fd8fd168f78a5b3c21e10e5b38f6f1ff16bfa3579014d8200f7f2",
    "signature": "0xe6b1354e5c4cd0b279f2eaf8c381e414f3fef89ade4d769f0c3d8ceaa6ffea3612eb5ca0c43fbf11f83fda8f5846603398abbe54ae93c9f5ea40ae74c9ba36f11b",
    "signer": "0xc3e03c21664729d32A8E77189667f4cC5091E233",
    "userId": "498109"
  }
}