{
  "manageEntity": {
    "action": "Save",
    "entityId": "593462",
    "entityType": "Track",
    "nonce": "0xf588f41c3cca1a97332f7581e01632bb8ca0ec052b5e1c382771c5bc65d71597",
    "signature": "0x4e480eecf3d37762e36bf470cce7bf7e6719081c05c48b95e49694dce846e5284d9272856f908704d144f6c66fe87ee81f5ed809db6760092facd4e93061a2111c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}