{
  "manageEntity": {
    "action": "Save",
    "entityId": "1971282664",
    "entityType": "Track",
    "nonce": "0x38353de82cd35f9b879fa8b4152987dc6af68cd9eeda03d4777d81049df7a7cc",
    "signature": "0xba5664ad7559857a04e66fe2cc1ff444e12b7845a5fc5ce1ee89f781dfb9d6d4001414044c44c7f32920a778db6b79442d48e7fe1062e3e609ea802adb9b5ea51b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}