{
  "manageEntity": {
    "action": "Save",
    "entityId": "1638584898",
    "entityType": "Track",
    "nonce": "0xae55836346f27e71ad29055cb1854f67f518ef63be28edd666efbe38f59b476b",
    "signature": "0xa677359001ded5ce14de9dedd85ecf8c851151b32abc29e44acd835f9f4a099016d8763998a008edf1f3382cd50512f0c6146fc4042c969b9374e37afb0e73d41b",
    "signer": "0xA6556f98e9bFB15D904562680c6a62517873f675",
    "userId": "532604076"
  }
}