{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf0a4a9bda9f6bf8790c403b73601763250e72f33c44fd2d9c43e27e3c477891",
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    "signer": "0x09F526D9F3fd00CAFaCBc826F871Acc14B901962",
    "userId": "226783633"
  }
}