{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xef4c00f8020609009e7cdf4a20ac1afdf55219d48c20e06deebd42c102a3de34",
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    "signer": "0x4Efe002fd2619a58Cb42ff57AB95B37f629DCf82",
    "userId": "424450408"
  }
}