{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x758486f9947247f4eb39a547c99466a367367bd2b8ab49722da7cd8751f728a2",
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    "signer": "0xFdB1a476e6b2525C8d78967730Dec5E6f522A7f6",
    "userId": "269522792"
  }
}