{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x072fed54b1fee844815dcf8b29cd427d3e8803205b8a17ebac4523fdab699f1f",
    "signature": "0x60177c15b2f124e840584854a77d4e312ae145d6568063291ca98f243b314d8b7b80a1d27bf4452c1813a1180ad3b2f02261a7ff0c38d9bfafa793b30ee5fff01c",
    "signer": "0x98397bC1E4AC918E146863f1061ce4833cE6e957",
    "userId": "235638022"
  }
}