{
  "manageEntity": {
    "action": "Save",
    "entityId": "394785815",
    "entityType": "Track",
    "nonce": "0xa802a6997c79ac62dd29f2a441089e1e2064c4914422f8528174791f242e754c",
    "signature": "0x4a85bca47adc80720c9684dd8145b4a71a6594ab026d05966e35263c8f1c954c5158cbcc1bdbbd78fd4392ef9025399f9fce821549fe5dc658b12172730b2bb51b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}