{
  "manageEntity": {
    "action": "Save",
    "entityId": "1680357381",
    "entityType": "Track",
    "nonce": "0xde93d7cdddb2fbac910e4168c3527deb80d4a0ecf233df1dbe9938eaad3cbe05",
    "signature": "0x5611807be368f489657a5c9710f1d46ad9ed9b0c178cef188cde3d88d1e429705e2a3364a6e80d2eff898cca324e5f5f6818b44fd32356413b519845db07b7a51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}