{
  "manageEntity": {
    "action": "Save",
    "entityId": "433787489",
    "entityType": "Track",
    "nonce": "0x16174f3b386dc9bfc58d14b74fb389f63166dbb6b1cef2a33fd1b6f89e57c5d4",
    "signature": "0xa9cff2422fdb420db84e090c87f6c770cd9d834650abe4c9b077d6120785dc6e3986507792f73949ce0276b71bbbed03d0b89541f6e25e3e32b8e4919c4cca411b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}