{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c4316262faa9c763cc9813a150e5e61203541a0f5bb2504e3a8863efdc7ec40",
    "signature": "0x01fc4d7d56810a91c4ea58446ca14c6387dd3011c8602f16f4dc2fa813b0e34378aa99678e2cb9e5d14db1c541f860ab4bbe60806ecb4c34d040c052c3e0ecd11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}