{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd09a633a89e3207cbda37d5e992919ee7e79e45ec248f768c9a3b8785233e4f2",
    "signature": "0xb5bca5695e2630da95f2d894b2c26dd22f67e94d9937dac5447d0f70adad3e4d0ec1bca344c96235c18f6e5774f436d0855039db43499db551146d7ffcca20ab1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}