{
  "manageEntity": {
    "action": "Save",
    "entityId": "1555921025",
    "entityType": "Track",
    "nonce": "0x42ee18a9bbc5217bfeb6db31c7169f600bcce3689eaa1301023d7b8ac1528e85",
    "signature": "0x74b05b02e5cdb770dfc6d102b4eb3fe72511ea2623e7359cbde0d68c2a7a9e3d4c898a3177439bc4b2bbd67795ea422b3cc1333c24fa25df3da58abe4757e1811b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}