{
  "manageEntity": {
    "action": "Save",
    "entityId": "2039756532",
    "entityType": "Track",
    "nonce": "0xb7ddae10b83770b1dee6557397af79d3b800e2f16bc151277f12b573ee301261",
    "signature": "0xe21ef55823d4f4e1d0f9578d6b372a11d06ed12e605f270749fd9410a188aa260b6b1a059590a58dd90fb3665d61ab6c9314d86010f51177462dd2d45391ccfa1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}