{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98b127b29575d6c8f7c63a307e0c5315693341aa199024524f227f7f6a7f516f",
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    "signer": "0x6fB63cf8d5C8cB39A1D86cB36Cc3FaeF00BB5760",
    "userId": "581103323"
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}