{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5b49657715f2c636a1e0f53b5f267f308c414c9e52e5e77d85603d5915090f8f",
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    "signer": "0x4C73FEA0aE69E486D85ad0140922DbA40BF09299",
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}