{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xacac8db9a504b4c0e386123ab73200891fb7a8ec40513bd97f99790298a0246a",
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    "signer": "0xd9c53074afbE0A31ECF8AAb5d899a8799f6bbFc3",
    "userId": "416697656"
  }
}