{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc2a4fb34c78d28aff6dc2adbdd709f4d9841efd4e4fa04b002354beb50a71d3e",
    "signature": "0xb445c844e0cc41873ff47cb473570eff64ecd945c7870d86aa2b28e66d05ec8c4d826f7d73ee575bab7b7e6b4e4787a42b6119815dc1cc74f487b21d47f283f81c",
    "signer": "0x8faf2E06cfa5e9Bbd735422814e20f2Ad01F9828",
    "userId": "318594821"
  }
}