{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x089e2ea8950541b3df2ad83cd2f83af0ff543f27ab5fe86b8b6fc905ed60cd79",
    "signature": "0xa113528bea09f057809d969365cf305d74d959bdbf689028437f611c2daf7e96140519aee758207875c5a047d92fd218b563d49858901b35626b6e068e17bfee1b",
    "signer": "0x3B56F03a62298a40720ab731A29231Ab2391037A",
    "userId": "523918731"
  }
}