{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012423148",
    "entityType": "Track",
    "nonce": "0x509e100c78667f8f3ff266ff4c314eb08afbf14120a957b5c495d01ac14f8beb",
    "signature": "0x682619c9c316319352b6ebcdeebd8c58f68f149e5013091a9fb13a0d40c5ca8d089c853078c960cfe9cc40508e86a472e4293fcb1d310453f22207f048cd66221c",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}