{
  "manageEntity": {
    "action": "Save",
    "entityId": "1586490703",
    "entityType": "Track",
    "nonce": "0x345d3d7dd8c949bafbbc4045c187018bc88a359c46fa8005ef4d73dbee17ed4d",
    "signature": "0xf836c0f747d6e2c2e11447cea8656540330dc50ed997c124ae3a282441b24c7f06a53f066131011fdaee159551aeb374fa67949f186b3ca3686870b8b11a9bd71c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}