{
  "manageEntity": {
    "action": "Save",
    "entityId": "1830086911",
    "entityType": "Track",
    "nonce": "0x777e7069b85880dc088886f6963bf0f0632bb85d062761a07da7e9da58134af3",
    "signature": "0x6c6cd39a3c9bcbc5cd8b4254fc772899c9d5a6907c35b0c78750c8d295b9e4b36d78fc9ee11a718444571b8925aa0d9f83d30427ec38f77bd72bb93a014179391b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}