{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa5241234c95de9b171448bf50e652fecad3e41e2c514674bd8b9f9511a2a6855",
    "signature": "0xc65f370f1b0a7f97a9739f636a0d8cd2cc8cb8d53f6441c058c77f4587443f34304f31c93b2226b4fc8fd8742a6baf567d57e30dc84f490b65c439606cdc190f1c",
    "signer": "0xD3e2a2Aeb739263055A5ec4484257b4927578D03",
    "userId": "117667088"
  }
}