{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe86c20271844496eba0f3be73e5458df89dc938649148b270bc427a8cd5b246e",
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    "signer": "0x57564cd9addcbA964DB61E2869871202F1DAeBF5",
    "userId": "262032562"
  }
}