{
  "manageEntity": {
    "action": "Save",
    "entityId": "529890570",
    "entityType": "Track",
    "nonce": "0xe9ca0c1a41a246165cd7cb79ab32f9a1fabea1600fe150fc7debec8c388346b0",
    "signature": "0x6c247e9b6e3c5ffa03c426f9269ed574a04e2ef59b221bd46fadca70e6b893967ba214b8acf17940be6369e360a5939b9848cb38e5a4bd6b4d4613ad5fff16521b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}