{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462960665",
    "entityType": "Track",
    "nonce": "0x098fff43a8f82763ea0e9e454d47622ad36cafc96401dc67727e4379a6a6dfd6",
    "signature": "0x2c75af5edc2a7ded2697fb1b592276ff725afd5247ed04c0f271ff85396cedd50791ffb25378bcfa19b70ef28999f4e2b73ac93e38ef753c7894e80520b1ce831b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}