{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x31cfb73201601ebb1200faab6c4a22f71cf68ac0dce902ef1c36a5e1a83a35af",
    "signature": "0x48fa5c545ef4a7d30f155584b11cd6be9bdb547f82716b41625e92ab36c0197c06d5dea0af7ac73980e9d6e2c114fb223a0e3207028ff5cbaca8701392f963251c",
    "signer": "0xaa223Ad6AD72c8f702876eb61AdbaE4F1f36EBA1",
    "userId": "974403669"
  }
}