{
  "manageEntity": {
    "action": "Save",
    "entityId": "474484",
    "entityType": "Track",
    "nonce": "0x95b6ae53a615f117cc9f41ac5f69ea6f61e4678e0694eceda831254779a82449",
    "signature": "0xeb71fa6e795114373c28d20d3de944e6dbb11cce4c2807a194ce5fc9b490ae80537babc68daf176b6697c461873870dba81f82dc2beb282035806819427396e11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}