{
  "manageEntity": {
    "action": "Save",
    "entityId": "775930515",
    "entityType": "Track",
    "nonce": "0xe335c1c1c806d4a6308fa32f9c12c84d4f27598d357dd57fa34a06c0d681de83",
    "signature": "0x7b3e9e1d66bb527eae1918aba73de224f27be14e5d9c8b2f672567c206b1456768876045479b7b72d8d58582d7898b38379025eb3a71c3048aae906bc2810d001b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}