{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe089faa7869dd1047e3893ddde0eeb0d98b700478bad5fc40df0003cb4cc30e3",
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    "signer": "0x4C239CFb7078b5F3C79094701e28f9E2A9fC70A5",
    "userId": "337548568"
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}