{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399964032",
    "entityType": "Track",
    "nonce": "0xfe2620454d96893431655c5f52982713c98dfbbb8542a9e3f88af62c461aa74c",
    "signature": "0xc57b346a60440bd7f9f8bc1afde73e0ce491a91e0ee49c30821f74ccd16c5b267f8dd0b9b055f3f8653760c24118308eccbd4fbd5731b161821c459137979e631b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}