{
  "manageEntity": {
    "action": "Save",
    "entityId": "1784509818",
    "entityType": "Track",
    "nonce": "0x3f1266ce26444d301247023039415a73b331bef180224a595119b03c28372526",
    "signature": "0x989997891cb1d7303c9e9c1adb722a9a1d3c962045948d2d78bcc74eb768fd7e3f9c8268a052b301012b31a9156fb7b821c02c6f9c7225c81c15b13c097710b21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}