{
  "manageEntity": {
    "action": "Save",
    "entityId": "133852",
    "entityType": "Track",
    "nonce": "0xb2cea5876b21f88712a9e9a53ed887cdab3ba6155921bb150481436a3c99ed88",
    "signature": "0xc15eba7c0fc783205698fd94edcad25e00e6300245154b664827b5ce5b145e305c6da604136919a7e1d296a267e5194879c57b02655d8866b5d2321c29c05e5f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}