{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625333890",
    "entityType": "Track",
    "nonce": "1790973610971650462",
    "signature": "0xdd97b46266a4223276303c8f78795aeab22e6bc90b4ced6a10ae2de8fb50293f2468735d0c06c8fd239fecbe5e1fbb1a1aa6456be666af7016ce220c5b4e377d1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}