{
  "manageEntity": {
    "action": "Save",
    "entityId": "1219925392",
    "entityType": "Track",
    "nonce": "0x06f9214a26f5e5731f330d186b34144f13927e882127711786169c0f8e201e13",
    "signature": "0xb3a7aeaf05b61c55ac9b61124a9a2d9da54272ae7d44c43114ed4725ae3b29d256dfda34b12f59c672a10ee73e7c43c98ec9ad3400ba1d4b4ca30a997b3fea3d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}