{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e95c97ccffb4938c3ce87daf732205639570813bcff2890e84b36aa0b99a3f6",
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    "signer": "0x5f2CeEE91c8826621E0Dca9853a13269C73c064e",
    "userId": "103931016"
  }
}