{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293132653",
    "entityType": "Track",
    "nonce": "0x8b783e88736095068db2fba060239b969a6784225571e4517705cec0fadc76fe",
    "signature": "0x87ff0a3291a3df40b4b56aabc4d86063b6af7c8b85bcb3ca6e8c3cebc71f08844b331065c1486c61e7d096026ceced4f35b5d26e96571f70df061d86592108e21c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}