{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x120cded8ae581f1d9b3da634541968ca73fda5185e379777fa36b3b1db66f639",
    "signature": "0x1b983ae78affe9d98cd69931a6d45405ca16c7a6bd22793435437229dfee1c240d8b2316d1fcf8613a45eaf915ad6fdabbb65e77bd72f1d91cd4d5c9f6f5e51a1c",
    "signer": "0x9Ab31a27D2bb88Cb09b3848b3d5A14E5EED7828A",
    "userId": "25139427"
  }
}