{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd3a407416ed615ce5327789e526a943169d17889153b74eb5472b92f522507ac",
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    "signer": "0x641D58d14cccB895cC85f210F1CD2B998A692F67",
    "userId": "308555958"
  }
}