{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092811324",
    "entityType": "Track",
    "nonce": "1786785170479456053",
    "signature": "0xa56390cee9c3f51ea6cd97f82484daf7402374be1dc1894a1fc130db4b0931437da19318ed870df1f2540b84a548dfc45bef9807e2321cec81f414ab08dc23bd1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}