{
  "manageEntity": {
    "action": "Save",
    "entityId": "2112449925",
    "entityType": "Track",
    "nonce": "1791472056404219939",
    "signature": "0xecf7630f365fde8a2bf8a6a41e72b82f0d21bc6133819a178fecf13becb7dfdc522ec190e00c4d2ed0a2136e548906fa461683396aff656c2bc7e196d02e13db1b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}