{
  "manageEntity": {
    "action": "Save",
    "entityId": "428443",
    "entityType": "Track",
    "nonce": "0x4462a7ef65950b700ddd9b34bb00a0d3d44fd0bcce3f8af03171966b69e1d91c",
    "signature": "0x768a79d7a46f1b0ed349a6039cf1329a9b98dfa8d842a69904308c89c4311f81068afdc7bebf9eb952766c86e1fd960116f04992632d7d451d66e3f83e8676d81b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}