{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075330529",
    "entityType": "Track",
    "nonce": "0xad3117b95df9902a6b5ec28d4a6f5b88e73330757a605b7882ef56ea08a6a002",
    "signature": "0x3a0cbd797029933a1e036cb07b510f997e24fb94e4864c075a0377b3da09605436f4963aabbd7db452f07f5ab4c24b7e9009fab8b204a0bb0f731bb554b67ef81b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}