{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe500d56e39d5fff2641666dbd75b029e7f68913e70824f47e0c4e01760ac7279",
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    "signer": "0x7a9beB830e77B75f0272D0090867Ae03DB123B38",
    "userId": "360694989"
  }
}