{
  "manageEntity": {
    "action": "Save",
    "entityId": "970572779",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd3418bac52a0277e5d47740c467d3dd695ea634927e58792a173a2f8c7ef96f4",
    "signature": "0xccab7687c3c753140c12fb9d1cc977d63cd7fcd2e4ca304e61fa3bc70eb70a71437abda5a0bfbf876eff3df427a20c7f097aca22acef868b6bab91e7535357431b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}