{
  "manageEntity": {
    "action": "Save",
    "entityId": "336513",
    "entityType": "Track",
    "nonce": "0x829a2920192e85ae8730c9f6871ffdd6353b6022abc41d802121e0abcf210316",
    "signature": "0x6f0b2fac3af88e280f8c7fc3d35910357052febbcefc8f973cee8516ce23a4ed359800733df5e24997d871a46e8df852c4e9364f9185bcdb1483e9a5c612de041b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}