{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbedb10165b052d93c3ed99a8556eedb1e42c74add1fd5d3b5d784ad9c32d4db0",
    "signature": "0xcc7f77090b97e2a2777086d01ab806596cf0fdc7e4d4cb0dbbff3d22746ddb3413219580677007aa22d56acf5f2e08005edd4486b7a668d4dfe48f8c68edf4b31b",
    "signer": "0x9976A5bDB93F69653188778fe013ed45ca0c2Ab1",
    "userId": "85051708"
  }
}