{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c6919060db7b6eee232db89ea8b6901333d5470977986fbbed09fe3c99987fc",
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    "signer": "0x6169b6243D65c4A1E869a3C7Db3e9F2bbC248a95",
    "userId": "75022890"
  }
}