{
  "manageEntity": {
    "action": "Save",
    "entityId": "111213",
    "entityType": "Track",
    "nonce": "0x0368011fe89b9987525ef24a27aace64495c60a1df42e1faa3a2f3801fe8d2cd",
    "signature": "0x0579c92c42afc7bb61309a1fa8105e6792386f56d6f3c2dba7f1454074f0007542b99bbe7cde2d637433c4ba20f0baa5a8a4c64e9c9c0849128f0620aef723b31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}