{
  "manageEntity": {
    "action": "Save",
    "entityId": "888173984",
    "entityType": "Track",
    "nonce": "0x190142bf0b67816c23fbeeec3a103f22471025957df1480bcdba5f72dd914f07",
    "signature": "0xadd3b8793b6c40f699fa6b7614e026566056ee4d1fe63ca4666762bc9c006c7d1c14846869f8522a14362b07693dbf6c936a7d5e8143e2d511759cbf5b0f2f9c1c",
    "signer": "0x33c702d534707f8Cada5DdD521C5900827973f1D",
    "userId": "5642"
  }
}