{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359699331",
    "entityType": "Track",
    "nonce": "0x2e10c03bc894caa56ad3cd2beee9769ad618a2c38fc2a0360b3f3480c0e2caad",
    "signature": "0x02b9fae5f455bca2291c1146b8b77c778244fa07164d2baf671c9f7cdf4ac72410aa10c32380d0805dfd006bf0ab07813d536e50aee6934822b24e7dfd431dfd1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}