{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaba835890367528624703caa775469c48c402fc1e9a6a35006269098c800febb",
    "signature": "0x10eb5a882e24b1f4e2a3b7327da19a0e4a1cd7c74cb067b250cce2529814982e117df1f009743545ee486162aac936717f094e1508910d1b2f3ac24f4ee93cbf1b",
    "signer": "0xce0095E8E9Bc88bd9bDaB88670ab4f8AAD4457Bc",
    "userId": "511852300"
  }
}