{
  "manageEntity": {
    "action": "Save",
    "entityId": "335797",
    "entityType": "Track",
    "nonce": "0xf65d91b1f2519f8db1ad111a27d1d02a6e9694c020e55bf90a963ae8b40df30c",
    "signature": "0x88cb1e6a738dcafc11b6419b89b1d41cc98d1e110f2a1659ab91e77b90b679b87a435fa932436f455e09a9478a96556811d6ca4f78d56b66ec34e9fa8d4a08b71c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}