{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6d7f64425475af99c709ebc471fca039776d69e414aafc84eac31f3bee6d6d1c",
    "signature": "0x02665f0300f03e7cb52eec791802b084b86522fb5eb63c85e27fab17b5af1d1141d1efe39e98c19116ef078c8910560fbe31b121bc8d341d76e9d30ac793ce961c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}