{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d274606c975ecb167e8cada878744790928c43b7d50c87f32875d0f8e957d99",
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    "signer": "0xE5a8065127808Be1b4292C121D4A8b8348d92217",
    "userId": "31935113"
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}