{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e99e40ec901d3022a20d57828077b8114c073f850c2c239c895a470daa9ba5a",
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    "signer": "0x0b2DB947a0dEc4669AB6C159D05c905EE0B3D7bc",
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}