{
  "manageEntity": {
    "action": "Save",
    "entityId": "1737384671",
    "entityType": "Track",
    "nonce": "0x9b4daea10d32070260335353516759043b51387d9a6d08d86263867774e4ed76",
    "signature": "0xb2d1262f4de60959a21606784cbdb819b4f0fcfe37a1f4424226f96d5d11850a68448a71f14cffe99b26c93fe83680047927fc5aaf1ca44d2e7ad69bb7528cdb1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}