{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc609f2d3f882fa183e71e02dc35ff242ef933c622ac8e8a74b5c16bc22d71e19",
    "signature": "0xe5af8048a25c15928a4336c256f6b2d49049577e6da35060a2e1d57ee759214c3f7493cad0f43584037ce5f6fb7faa711330b0a1c4580dad7c4ccc52bf61dea91c",
    "signer": "0x1692a1Ec6F40Ad8bb0eA48A6E60FA63F2CE81283",
    "userId": "391257411"
  }
}