{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8cadf2f0fab214be280b596ee7ecc393b4dd67fc3a291b9e909713c31a4441a1",
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    "signer": "0x68E5EBcBB99C8b9F3a5570476BE0a3D85d1290ae",
    "userId": "235912276"
  }
}