{
  "manageEntity": {
    "action": "Save",
    "entityId": "572277084",
    "entityType": "Track",
    "nonce": "0x0909477e19eed9c5f763246325d6e7268f74a185668ad6902e804df66bdd9526",
    "signature": "0xc84f7b2a3fd5bd5b2d294bb1814bff63f4eac58ad2af66695d3d830099863f2472951b9945a5cad7b94b86a67467a70b530d9c2dd5854a9d3532d56de4f95aa91b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}