{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f563e8e45fd4fcfdfc4104c7de8b04a2df4703015b619096c801b188d318b9f",
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    "signer": "0x5a295e904D719f9269D210eC54112486177D5b9D",
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}