{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd181d1a9b9a47ca9f597564c05d25ea61c490347682c13ab5097efbe1ac19d0",
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    "signer": "0x592CdCb22204FFD199568f9102277A0CdF8255D4",
    "userId": "459488125"
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}