{
  "manageEntity": {
    "action": "Save",
    "entityId": "312450",
    "entityType": "Track",
    "nonce": "0x714bbac1b5775f9645e6c090607ee47f5f6ea82a59f26072d1044c8dd414799b",
    "signature": "0x90fb553a216501f9d3c1daf7298bdbd0ef53f8082ed239ce660e7fbf4af0bd4f75f49272d48516b913fa4ac032d03bcab9172287cf665a43ecb9c00d9ff96b771c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}