{
  "manageEntity": {
    "action": "Save",
    "entityId": "672517579",
    "entityType": "Track",
    "nonce": "0x5d8e03f0e3b13f30c10ddf6d97c9a09e536dbc8bd13d15a30315ff11224b86f8",
    "signature": "0xe062725584f3c48d1a7c3182ed4262bfaf0e8d1d73cbba8819f061bb293187106c4c9b5b970b42fca366f4827ac6159adc83a9d23d3eb390cf38cb2c32dab73b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}