{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888342767",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x99414cf5588729ee7c10af48ecd559ca351e0e2a1a6a7bb8467d0be67662946d",
    "signature": "0x5b82752e40e19359a52880e9da5af2331bc82e644a3bdeb82b8eca5839ce055a1912a852e4fc19fd92f7d19466fa50048e267d4d80950cbc9d865720e0a02ec61b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}