{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x28fc195d350094b3042906b3476237691b75a4aff86c72736d1f08a57d4579a1",
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    "signer": "0x083626C5983025BFec0Ca7BC8FC5B244f8e29b75",
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}