{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e664540d9f38e18c9bc83f9d61520476d83b9afc914019371dba73caa6120a4",
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    "signer": "0xd79D6f64B387a54cF0F5747EFa4eAAec387AeeFF",
    "userId": "455100940"
  }
}