{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922957830",
    "entityType": "Track",
    "nonce": "0xdaf304a8d3a1f5b4ba0b1406e484195d9e0c5a591434c8872a1d3e0f0496d57f",
    "signature": "0x35275ec700c606bec47fdd6ab87c332f6084dbd91becbd63af420fc679b20e8c010e18f7ed29395d7865ca67bf718be7a4a77535d21a111e37ab2f2b3d782f921c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}