{
  "manageEntity": {
    "action": "Save",
    "entityId": "175635",
    "entityType": "Track",
    "nonce": "0x20f3d6e94452ad38f82073fe43f5ef8d0ac29944b7f25fa7ad91dacf8347c62a",
    "signature": "0x547bf4abce4e735146cd7c585df2dbc207930c4085d87b683e5b2780491460823ecd99ce92c42135ac2d5a53ba0784b1f69cef240bbd271fac6003a147e83e9c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}