{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7c617335f16b0eb1b56f1b22f148ff2aa4cf9a0dae975dda94a23ddf84ba5337",
    "signature": "0x3aa0658c72a33b8d4ee49d9cca9cd95a894ec29844036bf2fefcf14dc4f60dda29c4cc2c243bdd61cfa0a966347c111d6ecf0f4efdb7749439d0fea6b6d79ac31b",
    "signer": "0xde80fAAA7CD732faE04Ab28935d412e3dca22F6e",
    "userId": "672554339"
  }
}