{
  "manageEntity": {
    "action": "Save",
    "entityId": "1246762048",
    "entityType": "Track",
    "nonce": "1792045828231921980",
    "signature": "0x8f776d028a2e7fb3845f7d87bad4efbd1242ba6f4e764ea981b47c7d90cf3db172766024dcf417ce5bea81024083fe97199592b4860ba17fdb780b64b048d6df1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}