{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654770922",
    "entityType": "Track",
    "nonce": "0xe9a24e0d2298a562e559b4f168a76b3a219dfcd74dbf7be8ca50e0b06443ceee",
    "signature": "0x42bf7b2f63b30e7511c5a996474b327ca18cb3fb19204488e27b8e8069a1e5fe6f7a556e796cfdac2b538ca21bd107ad003430607578bd800dae26a9a383ad901b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}