{
  "manageEntity": {
    "action": "Save",
    "entityId": "318494104",
    "entityType": "Track",
    "nonce": "0xc4e66ec0bc66133c5730712b29e020521ed2ec6d5b23d9514a0ee8ab60c0d1d5",
    "signature": "0x3d4a54e4d78db315f7f45bfc9c6e7b9b437e32e0feb625bcd52b9ebfcc32bdf031d76a6f87307d6492d046beb0004dc9ffcced0b052c9a95c0eca557a79ff86d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}