{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3209fb5050c6a188cb5b98d3bb17810f9039845c5b9eb9b8909e00ae9fecc02",
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    "signer": "0x7331fBff38caf8d95B1b4A6d0eCc25Da1e1a4372",
    "userId": "399559582"
  }
}