{
  "manageEntity": {
    "action": "Save",
    "entityId": "679276590",
    "entityType": "Track",
    "nonce": "0xd371bdef4fdaed24e54bc29ee69ec79267c79627754cc3960f9e226656317220",
    "signature": "0x19ccaa1b27477e167e50baa3c0571be12d75d6226f1136ae50ae25910f861a7b79f6c55c9f8fca209a764be53d404b7989ab6d29951ec3754a723dd491bd61cf1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}