{
  "manageEntity": {
    "action": "Save",
    "entityId": "475016",
    "entityType": "Track",
    "nonce": "0xd22bad81432d143f8a005c9da4de9b35cfd178aad9283d34e9c7117b0c689036",
    "signature": "0xf486a38dae5fa33441e17faa85ca86bee37ed534b2e75cecc9fa3bf508246edc4f8aa4b7df7fb74fcf53cd4021f761dc9da8d10c3a793e1974ca9cddffa5b42f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}