{
  "manageEntity": {
    "action": "Save",
    "entityId": "179498681",
    "entityType": "Track",
    "nonce": "0xc7500f0524cd29904c2ab202a845a07097ccf5d47c91f3d49828540cb73953bd",
    "signature": "0x7a6504baf4e4363a973380168696b15baa4bc348e02254e97a36923669ed7ad32df59f9732d38c2e4283da92b40cff857187de5ec410c49a0a0556d9b85f256a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}