{
  "manageEntity": {
    "action": "Save",
    "entityId": "1193319641",
    "entityType": "Track",
    "nonce": "0xf6236ead8244ee07439119f7bfbf04f1b70ef902c9bcef8e9048ae21f918c0df",
    "signature": "0x136f14e5198f4fa64c1f6b73a2bf5c689d2802f8d7c1dd50b448728e2e95d2184efb14c5f21960b6e24adbf8d15fa0edc527ac918bb501e0be148299e1b4f9171c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}