{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67cfd3d87999a9141d781282bfb91bfcc3abee450ee0fad150b6c0794908f66a",
    "signature": "0xb8bc5f515aaf146fbaba4753c0c2607c5b981b88551bd5079e5cfa5b5a64af935edcc3627a495da78a8264b89d274ec00129821cef0b10afcf555f9eefb743e71b",
    "signer": "0x1ECD9688c615106d522cB00eA1d6974159dCEbD5",
    "userId": "205489491"
  }
}