{
  "manageEntity": {
    "action": "Update",
    "entityId": "1117144910",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"a\",\"is_private\":false,\"playlist_name\":\"Test\"}}",
    "nonce": "1778503149202296167",
    "signature": "0xee7cb4ca3792fbc566f6303877cd7553fface4e5bf62df3300823ea80da8932834473e3b5fb16c4390cb74142d047faa32b161482e67907d5e951c0fc36eeb1f1b",
    "signer": "0xecaC916FafF0E75Df08fc73D2252307ae8DF8981",
    "userId": "477662771"
  }
}