{
  "manageEntity": {
    "action": "Save",
    "entityId": "282549223",
    "entityType": "Track",
    "nonce": "0x6d77799ea1ed92f65c3c221b0c787ce8e52bc37b14e77acc7ec8c0cf19175b42",
    "signature": "0xb31dce7b882907d0c1e89ec07e88dbd76cb0d285b03b44e989b6ca241a1e567610350566d475ace2a3cec5317874ba4c15fe2ba81302f1d5ca21a6a48a6e53b51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}