{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b571fe3e2faa36a2fdd9269a2b8dbf020908ec8154a00047119c86d69471490",
    "signature": "0x0c494b624947780367de2d31fc2be22df97ebfa09b6d83cdb68da7568361956d71d82a52b2cf9f5bf2710961906e5559a719247235b14771aeb57f06af3772691c",
    "signer": "0x17449ae901f09cc0364daeC9929ca6557173b018",
    "userId": "552934486"
  }
}