{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a67b719fdf9477cc4697e07ec52f894c7da8974b7e66a4ab3df9e0609bf60ba",
    "signature": "0x1f555e2957ccb07fd9eba9a407aedba8e3cff399322177651596cdfebe714f044a8ca3fa40b966dd17cbb1df54b8bb99dd14acfffdd30279ec6e28aab39212811c",
    "signer": "0xceFfe9ad073f96B59Dd62fA8540630e96e9dac00",
    "userId": "688642427"
  }
}