{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012038",
    "entityType": "Track",
    "nonce": "0x5ff5639130b282bd9afe9d77857186b1aa9365a88b2fe87f30eb6414bcdc1870",
    "signature": "0x241ed0621da7f723e7262b3c7e2a562c566f5f67d9ebff98e55d9206ff0e52fa114bfe1a7dac63c8ddb15378bc10d231467c2d7fc5f05356124ebe7b3128b5011b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}