{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x65fa3ccbb4a4de9fb58d8cfa53779f86bd4961e95e2d9e22dbe9b21dbd9a9134",
    "signature": "0x676933110b6c66b441620bba8ce5acb873886e36793e31ff7f48265d84063c1e75b2ea3df4faf040f2ac5d8d79441eede7ba353b83d0f5b217ca986edbd999981b",
    "signer": "0x0A1576c1c1074FC75841d47BDeb7dce5eCe080FA",
    "userId": "181033681"
  }
}