{
  "manageEntity": {
    "action": "Save",
    "entityId": "368373",
    "entityType": "Track",
    "nonce": "0xe381aa6cf2c5d6ee5c62db7f32f185208eee7d3ff90490f04b679dacec508b20",
    "signature": "0xad870234a4ca0dc1429004ff738533a15f7cf72b75b97f3e052da025fcd9b44a3ebb865137176680af4d385b87c50fb8c918a3a636471d00de50b1c8ad9edb4c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}