{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073300771",
    "entityType": "Track",
    "nonce": "0x038e8c34e82bc6039fbe9c9729f9f216d3f2a6773393391cd1afcdad082f07fe",
    "signature": "0xe111061e9d81ef200f50d5a4a43fa31934d8202d4b50355587369b642a031784287a7632ed16843c622ffbd6776cc3d271f48ed9fc252559442c2f0cc9dccce71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}