{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x19c7d142f4d064e31e41c2460829021f9b207e9b01e6d5cc0158fbb1987f89d8",
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    "signer": "0x18572ad7cA3F323e798F548aCD3bc9e16375BFf8",
    "userId": "740199780"
  }
}