{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115923593",
    "entityType": "Track",
    "nonce": "0x1020771bfafba2e95867d1d91aae7ab013c3428048084a33ddb50f73f6b0f92f",
    "signature": "0x9cdbe604eadedd02627b17cfb5d2ca0eb2f50071ad7c1b2d82313d75ccf6aea6381ceee532a2a0a7fd6be67079c4e8b3b364061dc70915053654d1a0eb420dd71b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}