{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3025c81415ee45e9e208d64d880ecd7449eed3360559e67e194cc70996f03648",
    "signature": "0xa9c0f06ea21de6bfce85def91fbecf8f70c4e070425c5fc366f39cb0144ae2090d41501905f5d813c6a509cbf88506ccb96f6a77c18723d78154fbb909aaadbb1c",
    "signer": "0xe2C7aAD01cCe4b90134046027a85D812462c4BA8",
    "userId": "77040140"
  }
}