{
  "manageEntity": {
    "action": "Save",
    "entityId": "757740",
    "entityType": "Track",
    "nonce": "0x1033c442f4dce3c9e55ef23af47ae97ee516860ba7ef972d767197db1bbdb5b4",
    "signature": "0xbe0824d240e9741918fbd3beaf9ec9cbbdd8b54aaa145252ec282e4121ccfbd00686fbda6f17715d2192c29b46b650b42719ebdda3c3b2476d3e066be5859fb71c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}