{
  "manageEntity": {
    "action": "Save",
    "entityId": "406151",
    "entityType": "Track",
    "nonce": "0xfecc61bf70de34daf33a59e8c6fb3a9ef6dd997ec3b4b5cac0c9eedb80308da2",
    "signature": "0x64e3b00c0e4f23939d3ca890497a81d944e9b9b022204adb6bf9049f95af8fc77acbe0cf677d154631dd13d34473ee5047d1e38fda047b2c77e255d3b21be9291b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}