{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742435187",
    "entityType": "Track",
    "nonce": "0x28d504e33066973fe212527624753d07329da5794b4cce944e451d882ce97217",
    "signature": "0x15e8c9fe9ba02b0ce3cc0ed0f31c3cde1aea08f11896bcb04ffc15acf1ee1bd26cbe3c2e0e944e8e9d0391fb649bcf242752893e7c3c53ef8e4e63046e4331081b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}