{
  "manageEntity": {
    "action": "Save",
    "entityId": "1774971877",
    "entityType": "Track",
    "nonce": "0xcb04659fd07ee48a2bbaf7329cfde0923e115a87f6d1e4a1322da038ec694227",
    "signature": "0x8740d46e40b7c05c0fd3ab18fd562529f478f7a56e481c8f2ae52be1d7a97acf57aecbb4fa091a573a5069862a9cbc29131c6ff7e047202f7c3d9b656189b2641b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}