{
  "manageEntity": {
    "action": "Save",
    "entityId": "2142584500",
    "entityType": "Track",
    "nonce": "0xf92eddd69a7a42cfe34611ca99f8e0050e9111d94f3d57eccb01f301e9f06f31",
    "signature": "0xec1b4fba2e83d7299f0033f14c917d5eaaa51de0f6cb80fc5a14b6d5c891bcfb358d36a9b43a4ddcf94509694d92b67d048834b36068513943c99698fe681d201c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}