{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x618d80abd729b5ffdcf34ee1b7eec5624b895e0938806fb2fb9864f2248700dd",
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    "signer": "0x1EDDBc797b04b7864F81470484a72a09a03CA990",
    "userId": "88763753"
  }
}