{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x60c99afa2c1ac3f36779d865545924ec72bfd49ad29dcd9f8aaf671a7a7065ee",
    "signature": "0x8f43fc619b95acd6cf03a6a9dc44503adb576d3e88206e6be9147fa7c5240f6b45a38916123b8846607c9c968a7f36a14900ac6c60a562fe093a91a7a2ee899c1b",
    "signer": "0xe69c53BFc490812f3dc8929eec46e615955446FA",
    "userId": "589953833"
  }
}