{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396228858",
    "entityType": "Track",
    "nonce": "0x10f8002ddfc47517e624828df02518a59fe9efa2b1e59d206eca5305ea7aba3f",
    "signature": "0x9a2e6549484f8e14278c29b60cce46e43a86d099503c6d753304d7e36b257621679174abf22120e3f7f3ce1c05fcb5966629b0d42660d2b2a64199603ded33441c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}