{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98f99010cd9b7a4ea801c5ac2af0784c2d041a18d82f2c2d1ae775677783a4cd",
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    "signer": "0xDB5A147AE53021265B456ec04644E288A253C513",
    "userId": "275799540"
  }
}