{
  "manageEntity": {
    "action": "Save",
    "entityId": "1838748240",
    "entityType": "Track",
    "nonce": "0x73289475ace98f0c41acf3b9e3e78ff25e6b7f8958deabd55d442aaccaa6d684",
    "signature": "0x952c92c0402d7e230f3b26af408069915345c9a4707c06e6379e37b3195e1f1c4ba47f525709e36d1a1e4c7d306f79664d59465f9ea1656268bf0b3a5dc3bbc71c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}