{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0838cd3f69005601ebd1eaa9151505cf7b9b483069fbe8456b113849acec854",
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    "signer": "0xa69672CF7EB13bBa3667681983E92EcB8207FE8D",
    "userId": "886503471"
  }
}