{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x083c8116224db6dd1517b07f47ffc8be5a189d1cb6ce12fcbc36bae35ce28906",
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    "signer": "0x1F3aea6Ad99A4c8cBF2DE7047740F7D3E4e0730b",
    "userId": "928301477"
  }
}