{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac48ab296eca2daacd3626e6e096be733b52310b970a033a8b8c6a59efe1d936",
    "signature": "0x5d84c14d92bfef1758f1bd24ced66d03f016f6e0a6d844b032788bc1c812bc8b610e3c2aeee47c1127825203c990bccdd2da064aad1cd3bc2739c774c63b429d1b",
    "signer": "0x1Df693Ed633B381cB87b6D8C559fB0C7Bf5eB6af",
    "userId": "823447086"
  }
}