{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1e2e248633fcad8f1007fd6790d037f3eaf4733cb235f5a5098454cd40fd7a7",
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    "signer": "0x2Be7ed6ED9E8fc866CB691E0d1B74A1E0C97f002",
    "userId": "863921077"
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}