{
  "manageEntity": {
    "action": "Save",
    "entityId": "893765621",
    "entityType": "Track",
    "nonce": "0x7805d25d0e9ad4efac16178e4535cbd64af40cea9bfb6fc76af7715d26ac752d",
    "signature": "0x6121d70c4b135fc560f382f2c6e8100458cbc5796e8e8d66d8ec496f1dbeb61d3834ee8b248b02cbf2258a09b9a4e97762bdaf9eec00f009a3227677840d50f01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}