{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1bcecacebd9858ce1ab121f306690a5a51a0b6e5ecaaebc71b0eb15e753b0568",
    "signature": "0x5de4cf9a7f97a256607ec2f9bec0d0013e40155c29769cf0dad372b1d5ce1be65afb26d5ae39325e4e2cfd3b0ce9a23939d0b7f326682bcebc2b83684bdb42dc1b",
    "signer": "0x205678e73475844a14D03Ad17675d0dF5C2cD524",
    "userId": "422965736"
  }
}