{
  "manageEntity": {
    "action": "Save",
    "entityId": "285510",
    "entityType": "Track",
    "nonce": "0x769dcd0e218d80c868e576be8dca825cc0dd2900210b31a22d6aac66424c64c5",
    "signature": "0x5bb3e718f2ff055a8c1fde0257e300017ba6e1418e1b29ae8b7e153a899410ea6cd05dcb8141e5bbd0300ff93de220147e883ff4925346152492d726881e1a191c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}