{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203654237",
    "entityType": "Track",
    "nonce": "1792448238966461009",
    "signature": "0x0bc76f3fe6bb0cf8dcdb4e82de13efeeee2d75af7479d3cda022f99155e17dfd58bc8b1c50163abf5361560d1517474117d40b224b917c2dd18fe2c6047328fa1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}