{
  "manageEntity": {
    "action": "Save",
    "entityId": "355751732",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0617f169afd9d679d18ba6a7035d26c574b3b65bc22d1155c4c01323297feb0",
    "signature": "0xe471a6fda220c355c9be0c9063a3ec60aa2630afd2f05a565013985ad730ceef234d6ca1aaf6f9618cb9bb7d71a720e094c19cb4d78be4b03a4e0deaba9ea1331c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}