{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfc2467bad153828ea0a46c69a44afa8a35db37a88bac17fe167d90799ec4c912",
    "signature": "0xf8e85f1e209a84443ed92d8f2549bc002c07a605847416db69d3b442bc38d42369591f0d53de8fe9931b70b81de45d4994cfa1aef97a969485120494e26d8d361c",
    "signer": "0x5c49999947248598b51CddD1B8cAE17c4A6FD94e",
    "userId": "536024564"
  }
}