{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3468f3e185cc2317a962210bb5a5d6b9da3637ed9e296eeef61439709d21c117",
    "signature": "0x50632f5f0529a96a46ee8c6bd0889111072ed1b1b2502397963303c74a4e1583743677d37c939fe298ac20a610247721afca83de95d19a5cce60d8a3daf564001b",
    "signer": "0x8034D591D4CA0231Ce46B64D37bdf415E4BEd4c4",
    "userId": "47471151"
  }
}