{
  "manageEntity": {
    "action": "Save",
    "entityId": "146094574",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67968db26c5c578bba41180df5975d7ef6e5eccff6e0778816e87167771a0964",
    "signature": "0xb85d8a6440cc989480b59ba2c83af14ffdd365fc50b326a33151592e68b514af57f83e07910c76d58138097e89fd3f42ab6e93c14635237fddc1c47d321a4cd61b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}