{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3bbfd141c637db87cca447a3fc3927ac4db5f58999f5656c752c752869fb5eaa",
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    "signer": "0x721f076D6fdC57634d612324093cA69B47866867",
    "userId": "303348966"
  }
}