{
  "manageEntity": {
    "action": "Save",
    "entityId": "9748064",
    "entityType": "Track",
    "nonce": "0x06aa2340391ee488d3f30998b5da9527b3bfea29a82c341bdd658bcda5506308",
    "signature": "0x0bd0210c4a153337e57e0f4124a9eebb54e5a465981a1561cacf5115d129e9a37704cfea286662e95a8f3e7e86b1f6286bd352799a449bbc0aeb24dd19ac9d3a1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}