{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "450928854",
    "entityType": "User",
    "nonce": "0x6badd6a9720b1f9284164c74f1daab1627a295910c5cca534b2e4ad90898f30d",
    "signature": "0x3f5ecab424c1cc1835ffe1413be4e15e31daf7cc4d38d76cfa31d22e4e246b7052b24afd0cece8176075f7f295c5217b9ffee74ca422e46ed60d25453c213fad1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}