{
  "manageEntity": {
    "action": "Save",
    "entityId": "188451613",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e8896585d9ce39c35655b1d7615917c27be464c3627b7d1d66296c92973c391",
    "signature": "0x48a45c320d868fcbe2d7229ad04fad757ecbbab8057c581dac94b232b79f086d7474c99e291524f11aca1675b58b798b8fee93a549e2934ba3cfe97356268c421b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}