{
  "manageEntity": {
    "action": "Save",
    "entityId": "135423381",
    "entityType": "Track",
    "nonce": "0x74241926dab53fc6b4b1c722d843f9b59bd6c5b0e8ab9c509ae635ed6b006eda",
    "signature": "0x4a725270d29f936019d0e5e849e0dbe05f5227bbeb50f28bf4f6953e9e9372c95cdeaee35b49dae29a16410f7b3118e6ed48fbe77a5d08677e7e2f5137934d911b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}