{
  "manageEntity": {
    "action": "Save",
    "entityId": "384328",
    "entityType": "Track",
    "nonce": "0x6ee9fd57d17292fea1f4c9ce117949b5859a22296916415aff66dd5b5afe2e29",
    "signature": "0x649ff8b4bb0acd83081e5120070cb1432dfa8a0b9a40b84d18732d7a541afc510aa4c51b1d19e808f339fbb6128bb2548ebd8c43f259513e1235aec4f2a940e51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}