{
  "manageEntity": {
    "action": "Save",
    "entityId": "1600061194",
    "entityType": "Track",
    "nonce": "0x5b9da62dcc4f886345ab7cc6504c037678a4797e1f0ee1d287f852e8e099da04",
    "signature": "0x57671aa62ed70af741539058fa139d297e29f2bf792de540fbc446264eed8c1346fd8d30254773ebe81d382ad0d25a077e7e3d868f375435d6582297fa69d9f51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}