{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x88161ce3425eb3d4b2df35997ed33dbbc014d48f3dcc89ba0af7776c47418d0b",
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    "signer": "0x6A409f4D8af22d7ecd049e1F789B2b7A2A090889",
    "userId": "528270205"
  }
}