{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb4d433ff59777e84b79db5e336b8cd694107d247992e94a41ea05b4bc30a4fcf",
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    "signer": "0x4787CE03de21Dd66aEd548B5eE0786E8cbEbF804",
    "userId": "768321185"
  }
}