{
  "manageEntity": {
    "action": "Save",
    "entityId": "178252",
    "entityType": "Track",
    "nonce": "0x548a2676f13003e4d5b1eabc89a053fa2f9642705fe5a9a60c90f42229755f05",
    "signature": "0x00413e252592ef75c662dd1dfd14f4305ed7e34d47d05945ccd2df3237ff6fa41e85df88bd2bc5ab6cc6bb2a7ff29a941b06fd67e5820751d1989240d607fd7e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}