{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92cefe6fba26c232c97ce0612dea72b2b54734028396f573ea9aba8177cd42eb",
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    "signer": "0x3e31c0900E5b08014B60BF74284B04565C9844DB",
    "userId": "60841394"
  }
}