{
  "manageEntity": {
    "action": "Save",
    "entityId": "1723566456",
    "entityType": "Track",
    "nonce": "0x45924c9caeb32b47e451739df910c8bfad094d41ee160a44c787c0d5df9ffcc9",
    "signature": "0x12db159181c5f0207c21412cc27c37dd502549d4f62ae48b963cc7e1dbbd995660f0f8b26c543cf1574bc3c6087ee59f7291a3c1e6c4f004c556506df637ddc71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}