{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a5b87478305f71834fb22e907d3e32f718c4f63f98239f15447b044f36a3240",
    "signature": "0x120a0191a103614ea3e58d5fe792782db6f76738914cce1544fd22ca852cfd8b0d442732fa4ae0105a1d76f913397d51872122ac81f157f3ec6764832c4bcd921b",
    "signer": "0xc2009c7F2795E038182C90651E17DC5Bfa03D005",
    "userId": "621598376"
  }
}