{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xabea2d6a9c9d4557a13cf47b1cb4e2771c5803ed7f66ec7bb3eeb5d3caea3bfe",
    "signature": "0xdaca1f2f4d363b5da391ad7ffd665b9e36801d58e8b5b8328cd2f6f36bb435a5345198a0947af8fccb13222b68240d20959fe78b8f6f30f8e36d90d2a7c530c11c",
    "signer": "0x8F182fe722FaD992BFa8591dE7c1515A4509F742",
    "userId": "289612370"
  }
}