{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896472651",
    "entityType": "Track",
    "nonce": "0x89362b66d64cf9dbb99a7252b16a5d1d59e5c2b7f90a867c81ab5f0be98f4eaf",
    "signature": "0x33b1ed1e30efbb1c84754f2dff45f2980fa00af4bccfae48bf6d7107094cd22533e5d3e4489055748e244123f40279185e67cd45e33bd8edb36b5baf0f3ffe381c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}