{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaaa5050585450d757d06e1670690fac5cd23a9e1f2bcfc95906f25e886157a08",
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    "signer": "0x89Da1135f434C0AD99f97F58B88d82E298931B9a",
    "userId": "379581888"
  }
}