{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0ac46cd7e56365c94cb1f3b100f40fde57976e3f65e89ca05d0a71583599053",
    "signature": "0xffdf0bbe66058f832cd26f740ca0a4b40e74072fa8bd5baf05cdedff4619fa2c1d44866cc1aa65527f0191351d5f4e322aeec60492f68f6eda3e460d4afc65461b",
    "signer": "0xa92ae5B1E69cC0016dF96916eE7B91E1b820EAc1",
    "userId": "956724930"
  }
}