{
  "manageEntity": {
    "action": "Save",
    "entityId": "544597822",
    "entityType": "Track",
    "nonce": "0xc3d28e445191a176d8a219ae64a7bc87c57592f011c3ad3b622e512893902124",
    "signature": "0x207a76de5c954ffc9439eca07b98ff4a69a0bfac32013a835b9562086657d81949a489b5d0feef4561557daa9a2789ea2b5d9aa6229fd68b8cfa4a8b6797cdfe1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}