{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323287611",
    "entityType": "Track",
    "nonce": "0xc995a01b028d5b5b9cd34651b6894bcceccb7ba9142bc2bb58dda39ee0073b79",
    "signature": "0xced5fb6028a8f51763c37f6f2817d2f1f68e051d931ca23b84aa3e2014c7534b2500362e7e09927ac127ceca8eb0af7f9d319216768cba77f909fbc88c72a8651c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}