{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a3a45443f2ed3ae80c170b0ff9bfd23c3e26ead6f7f53b7a59e36554a0917c5",
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    "signer": "0x1B25a911B984d84b1eEd0fc2665fc92b28eef16B",
    "userId": "853204284"
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}