{
  "manageEntity": {
    "action": "Save",
    "entityId": "138575",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67ac47d82604a9b77f2f61eac8f1c1ae55a6f737698a753036a0a680acd1f179",
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    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}