{
  "manageEntity": {
    "action": "Save",
    "entityId": "572872595",
    "entityType": "Track",
    "nonce": "0x48798ab6b8d84988a1565c775fb9c629dad1b9588e1c9c8120bb7b16be6a0149",
    "signature": "0xee33220fe7e8e8ca6cdc5608429a844a3062cf335b3eba8fbd72003ae0f36b783bdb324f09b246b619a0f4e2bcc6664ce8f2b6fb65a8552a299e849cae33167e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}