{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa5ff283082b0aa0a26cbd0f36ee8fcc2c23768cf2d83b77568b1be3d6cfbc6f9",
    "signature": "0x267fa63a06c76c874211ca87c0770c833c99662d927931163e225ecf65fc11c45d3c5facd93f78d56bead9f02920d3b148e5a99864f527873050c55ff126dffd1b",
    "signer": "0x4c91D7ff58E18f3e4C4e7bF6c5cF428a57d087E4",
    "userId": "633873586"
  }
}