{
  "manageEntity": {
    "action": "Save",
    "entityId": "864984833",
    "entityType": "Track",
    "nonce": "0x30c5af74e0f1846ca4c0f46cc220bd49aa57d74ba9b33bab0be752b4327863be",
    "signature": "0x93e38754bf6396991e35bd5506e11aaba10cd6d180a4e883f1c9afb6399a170e47ae3591428bbdec2a2c90819f8cca3fc06df94b07844b4c51c309f3f35821c61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}