{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787701112",
    "entityType": "Track",
    "nonce": "0x660bbc62785b12ea6abff2184bfeddff0b0154d45b711146f45ea29705fd29db",
    "signature": "0x37ee7ec13e07947e4e8f49ff3b21bcac7e2484b5b6b5f1059daa259fcad27a116c323ca2de3e09d4d84a7d4d305e3996c02b4e4cc9e7eede6b33bdb243e7b4051b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}