{
  "manageEntity": {
    "action": "Save",
    "entityId": "1719771983",
    "entityType": "Track",
    "nonce": "0x0e30395218350528fe0566cfa6489c8b1b730cc9991d312fa61bfd94363f2262",
    "signature": "0x77114b648f28aa9c75d9aef0c56d1a46c51e78d8f7586f96f63712944820625a1a7955694f54b73fd991b8afa12d3f181c5231aa9033b86d60d92b3ce3977bb41c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}