{
  "manageEntity": {
    "action": "Save",
    "entityId": "560333",
    "entityType": "Track",
    "nonce": "0xdb0c86564d1fd87573abdc84933024cbcee255b3d835ca2bbffb3f151dc984b4",
    "signature": "0x6188935fa80a50f402c9354ece5225932b515133bd5cb48b8d4bbcb3e8da5de1189b1c4e9426748516ba0dd4873997e921a4b778ea872d8aa0cd71f12e456b431b",
    "signer": "0xB28c3e71Ce63Ff378DF87C1f77d4F79d444b5E98",
    "userId": "92529900"
  }
}