{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xad2397335be72907dbddb859efdc2b0d11db9ac2ad80879bc558adbd88c83a6b",
    "signature": "0xa8003205f322b1fd95f89b1c74b39d8cb1ca460ce2dcaaf557ba937e1ad58c486c93d07f89b3e0522ec6bae42947b0286253c745138f2d9432b6b702a900fdb71b",
    "signer": "0xB0dD81Dd254D8c37c32ba018674a7DA5FF536d8D",
    "userId": "412939682"
  }
}