{
  "manageEntity": {
    "action": "Save",
    "entityId": "392176524",
    "entityType": "Track",
    "nonce": "0x75cbcc626f6da9f9902588c8d01701e4962c620f5999d99f7084e713247ec9a9",
    "signature": "0x30dcaca85fa3272724281cd139d5b91b69d1528f3a529510e9c8b020042201170bb66e1dda7ba018255fbf6c8978e625f3b283ac8557865e2bf57a7665c7c8611c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}