{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2d213975873789614f399514af8eb2d32f3e4ddbdb711369484230ef32b2e6ce",
    "signature": "0x778e9048be424dcb02194f1b6319f92b799cb49eba357c720c59ea91894aa44e25f6f5d0c907f000e5467bbfa9ed1aff5a8d439feaa9662d1b66d95fd953eeff1c",
    "signer": "0x117e656B4810D0f42C44E311B57cc6D7e5B6d265",
    "userId": "704914193"
  }
}