{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda02e46179ddf75b472fa3c2d72df52cc41e00b631f50c55ed9c90038de40b55",
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    "signer": "0x3358fcad34d13B8E302948fb453Aa3289ca5b727",
    "userId": "759125877"
  }
}