{
  "manageEntity": {
    "action": "Save",
    "entityId": "280663466",
    "entityType": "Track",
    "nonce": "0x83304f69ddd5c44aaa4d5b63c705fa5b49cf7e08a8e8004809e0cf6ec15755ca",
    "signature": "0x6243a98d6c4c70c7e1f4cb6b06d9fb3c1c26b2eedf9e4136a5890f4d63963c70774d9eb8ed8d59cf8cef80e96841ef6d7458e5b667c52cf1994267927c6336f41c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}