{
  "manageEntity": {
    "action": "Save",
    "entityId": "1269934075",
    "entityType": "Track",
    "nonce": "0x86a81173b0f30bf405ec7f18f7bc552dbc67b4a530d042e4960523fd650446d9",
    "signature": "0xa45adf2700927818ecaac259b347c8ea4607dbad15cfd9f9135a06b731e57c4b14cda9aaa74234bea3a5eae8308410ac092ee48bdac7735f681ef02ed36f2c041b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}