{
  "manageEntity": {
    "action": "Save",
    "entityId": "600127031",
    "entityType": "Track",
    "nonce": "0x321a673eecca63b3df289a9777d07ae6d8c0388e1c11eb2aab61a82d542490e7",
    "signature": "0xca45ae647c3265d696dd6e8a7f3cd8f6b455e45a07bb7ef9f71de214c5e8acf913289e6655cb44c5015c514317a6a10eebdd8ff11f4e1e31dfabec7dae99686e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}