{
  "manageEntity": {
    "action": "Save",
    "entityId": "712829224",
    "entityType": "Track",
    "nonce": "0xb5d7e9c07d07cf4a9da4be8a9bba7d73bdbd8b84d2343b3f7d186bdb5a3b88b4",
    "signature": "0xff980d4030678454cc062834796ec2261df3187aa4859ff7cd4fd1c5744280475a09a3c35dec43aee59e551f026ad60e56b42c9279ca6007c26c57215defa6291b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}