{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ae0ead6fa2b4c053c6a5dd8c3d858d9d603d5f7de8688b787d3c6d16b7a081e",
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    "signer": "0x1d7977a438bBF99AafdA2633A385c2989813552f",
    "userId": "447156818"
  }
}