{
  "manageEntity": {
    "action": "Save",
    "entityId": "1663747544",
    "entityType": "Track",
    "nonce": "0x145b8eb2313692f74d1e9305235713c61ec0b6203a9fb9bba3d18e11b6ab947d",
    "signature": "0xcb5de34508dc2b58a8ca448eb45a1f772cc942fa6addac3a649d43063f63c7fc283d54855c4c0bac245e7e76539092522776d49d9a98d339164c0fe3a19e6af31b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}