{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029793",
    "entityType": "Track",
    "nonce": "0xfb9f4892b8c648f379a5bae5d8f077d998f08cef3e0c5d40d3c2acc7d509a608",
    "signature": "0x0f96792a7e2e3916d2feecb7e91575d619ca95b90ffdeffaedeca3a90173c2275903e72bdcd6ea8cdde7e945bcfea8b466a86d41c628b56379abed0b3be7a1481c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}