{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfbf309ca5afd381dca8cd2c8c6a2a68c65e653dee56a4db32a48dd72c2fafdc7",
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    "signer": "0x83c05a5122b8722Ac3e930f288127802777cf71D",
    "userId": "457991167"
  }
}