{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5fccf7503cf93b3e0ccf99c4f16190df37fa73576853f6734150daeb2896a5b7",
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    "signer": "0x8b043BD3b34D973FFb09C785561BA121147C670a",
    "userId": "52254237"
  }
}