{
  "manageEntity": {
    "action": "Save",
    "entityId": "872219071",
    "entityType": "Track",
    "nonce": "0x92b527dabe5cd0e005419c479138a94b55fa81fb3755acff15bfe50e0eb586ea",
    "signature": "0x21ae517fa6d637ed8d96d2dbefa571af7519513f6113c9b9c836a85abb1511fe121f6e77dc57a27473b12a2ac2a4df6ae0092d159500b72ed545d7278c41df181b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}