{
  "manageEntity": {
    "action": "Save",
    "entityId": "203788",
    "entityType": "Track",
    "nonce": "0x212c990dfc992584471a129efb90292c47bab49a4cb4b26f16fd6d9a84f198a7",
    "signature": "0xa700aa04408d796db52c5921489e1282555e8bbac8ff5f4cc4466d3ec195beee091d979fef374a2ab83bca1d43f4238183e18fa063b83701840e5ceb3b1321301c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}