{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfed6bafb45c50a3ed6ccd81b70baf37745c68ec39af4730dbebe5a27f9f8233a",
    "signature": "0xc5c998698b6743bfa4f8b3eb0c5e48b8e279b108e47069cf5ad5ff6fd98d6e3443167308ff876e13ad7a4facb2228c4c080223767bd75bc4548445ab241a09e21c",
    "signer": "0x5FEA9900beFE30C9C2aD8Fd319B2A4E9A24d8a71",
    "userId": "705439587"
  }
}