{
  "manageEntity": {
    "action": "Save",
    "entityId": "408226",
    "entityType": "Track",
    "nonce": "0xcd6b5bbff881d820f3bea2e3944f2262ce02b2b65ab5e2fee1c9b4b773f3ce3f",
    "signature": "0xa90639f63449b709666b28dd46f8e84ca1360f8b47e6f0b5ab3f3ec79f7b1eb13cda8856dbbf85b2fc126c95dac2fd615ea5f1c863442fdaa0136a3178f297551c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}