{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9cfba040d673f712ace0f734254f7dcc5b13f60dcbb10db0e4e827581a4852b6",
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    "signer": "0x4C73FEA0aE69E486D85ad0140922DbA40BF09299",
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}