{
  "manageEntity": {
    "action": "Save",
    "entityId": "10220213",
    "entityType": "Track",
    "nonce": "0x5a50b3f91d82775b5a496f00d96ba0e760f430356b6b34daaf63b36dcb0ae2ab",
    "signature": "0xf09be2016b6ede7a3c0169f2ce143a79fe88259ac6facf9b5a50b617c7cd0259365fc7961ce2c4ccae41f7beb7d24fcfb872ae6c7afd67b876606ce6778b9c7d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}