{
  "manageEntity": {
    "action": "Save",
    "entityId": "1937303458",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8b145e18ab4efa29ac40e39b43e65598cdbb76a47e936a8bb3df0118f977b1cf",
    "signature": "0x5d8f0e24cd5871c0aa63d2298f8f7b77533b7956fd910fbf4204b8ebed002f4b0766278d593c6fef6f72312aa115764664d5f79a648f9f7b6f43399ff1137f3d1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}