{
  "manageEntity": {
    "action": "Save",
    "entityId": "728363",
    "entityType": "Track",
    "nonce": "0xeaad6448d9150c204573f411051721fa883390764c93139b94800f1a53e42f3f",
    "signature": "0x65dcc8bddaec95e69883158b498b888729e1294159d504815de9a94918d6879368f49a139d902e9f96e7499f3f4f0ae66da1c1be8a7240ab53fbb3d0be07b2371b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}