{
  "manageEntity": {
    "action": "Save",
    "entityId": "239618",
    "entityType": "Track",
    "nonce": "0x10c6eed5ef07e6eae4d4b93c63566363e304b029cb7762f7ccfbd877af4973e6",
    "signature": "0xe9545d3933cc387bcf8bfdd7068883d2917e44a187767deb475db341010125793dc3b279b78983e5fb3730801a7310e89b0c42810c568b7ea2dbfc67a70187dc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}