{
  "manageEntity": {
    "action": "Save",
    "entityId": "513035966",
    "entityType": "Track",
    "nonce": "0xa4c4811e1c6b91ee41294f767271ddf574a4ba01f60f136c82c99b43120aa735",
    "signature": "0xabed618495e427b104d7f89540f95dff48bbc8991f8cbf710d6b4190ade458f2642f568e5e6e2e53bd832e577e200f3775829d4ec1733b22c62c8c868a1ef8e01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}