{
  "manageEntity": {
    "action": "Save",
    "entityId": "1645723705",
    "entityType": "Track",
    "nonce": "0xc93c761842f36781a4807f720cabd2fe090e395f708dd1dcc0127225bcb849b8",
    "signature": "0xf5c5d1c3d2f9e212107827296e09ecabfdffe25beab30b344e563cc0867c93861ff6c37b6132ac0cc720b0d8cda7e2b5ae0743b1128c8e587fb96e71eff243711b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}