{
  "manageEntity": {
    "action": "Save",
    "entityId": "133231",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ef586c5fc15400ec597cd4f483704ac36ee35b3ad421d6bc163b7b7c5cde0fd",
    "signature": "0x9587065c1990015c0565a65637179aa167a8af02e042d43c011fc8493a8487ab6e8483bd5616f4bf46a0de00a6e2439ed88bbd8ff6f0fde62090d1a24a8040081b",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}