{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524981252",
    "entityType": "Track",
    "nonce": "0x5cb7c5718ef39b765cca8ab7796a81190a3ca28bce162c19af8c8494ec2638b7",
    "signature": "0xe839e3a34bb4aba9e469282f8ece6d1018a69d112693ef28a1add01f4e8e662c4b08657cf47b3849f364ca89c96f93cda26b9743d038317ee4ae070af27708001c",
    "signer": "0xE50A7CF0F7C9D1ad4Ec8b26E4532CBF635c04e12",
    "userId": "357010"
  }
}