{
  "manageEntity": {
    "action": "Save",
    "entityId": "818839545",
    "entityType": "Track",
    "nonce": "0x80801a02409f380ec7e41a27bae98dcfef565856e96e074b3be80cb27f914947",
    "signature": "0x401abc8176cd22abc3a43c3d3c4c56f35626a42732a15ca12f0743a2ac5a3da07b8832cc3921ea7e66b9b9ebf521591d03b1bd4f2f4031b90894467cd921c89a1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}