{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e1be5cc0bafb122c8061b66135110564018cf523d0b0834584aae52ea26429b",
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    "signer": "0x563EE268f30985Ed6dF43E3c9CeC87Ed136e697C",
    "userId": "152378654"
  }
}