{
  "manageEntity": {
    "action": "Save",
    "entityId": "607907210",
    "entityType": "Track",
    "nonce": "0x168982709154cceb00fcb531bef1e665adcda76a604354f3067bcea2d1396124",
    "signature": "0x63ad6c57c97de38d22b611e599d9089de832ca8f7ae502ee8cf59ccfca3f7d8010f3dde326bed26510f5d0d5b73e518dd76e77fb5b085df0d28fd573def44c181c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}