{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3396",
    "entityType": "User",
    "nonce": "0xa3f7b1fe1f03ab9052b6efcdfcf5d13644e8f570d4b6e6ee2823d9eb240d6890",
    "signature": "0xfcf75a5c87ce5c111864fc2152ce73417a55ef5d815b1b17c8bcdfef7965c42d579320502a918a7c047a8aa3924a5f30f97f14d4fd55fb7cb4f18158e09d03aa1c",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}