{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x84ddcf403c7da845d85e208c892b52ea119084847e7973129b0771ce930116ff",
    "signature": "0x88b77e5353353f2aa19b86c076fced691578274faba76be3be01a6431359c4f959db6e3cdc3dce6ff0bf029db069db6dd2dc811262b9dc04e1c366dbcd852a281c",
    "signer": "0x29EEda1E7eF2d7C7B5dE243F5b7de53F1E2d23Ff",
    "userId": "817425333"
  }
}