{
  "manageEntity": {
    "action": "Save",
    "entityId": "820296001",
    "entityType": "Track",
    "nonce": "0x2d9982f31e9a78584b1402a8ce2bc7729cd8679cbbd532ba26ef610a1d26672f",
    "signature": "0x39bf29c2252e22c2c1ae55e0ef2a6e1039b515c0d8350cadf7081df020035e313548bf90bf72c7ec5dd28cf6b3eaf977e846a2ecad9af83b7d3af88a847f5b0f1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}