{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3093fe43d664ac2afe4225719455ab79d61694f334bbf190c2610bc986d6ec96",
    "signature": "0xbf00f408cc07a315dc3664bf12fdbbf7e99bee387d3b4e708367efa30acc022835a6b5ef1d2005b0d5d0f45d8cf61da59686c4bf4732affc3656e4688cd69b841c",
    "signer": "0x62c97d7bde145A438C26C21F10116CBEecb45779",
    "userId": "769111966"
  }
}