{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131915589",
    "entityType": "Track",
    "nonce": "0x34b00718370f85c6dfbe594658668e6634f1f0b17b66ef2ffd0d76338143d8a0",
    "signature": "0x682bc954db3a89180286db79e0c9991614d32d85ff814855683f59f8f563eabf096ba71ed955e1a1498bf0334adb9fe15ad159d2486d984ffbdad71491441bcc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}