{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942802103",
    "entityType": "Track",
    "nonce": "0x416acbefbe87fe885df948c104feaa14795e3fa19061bc68b198ce69ee0339d4",
    "signature": "0x3831e651483ebc80bb3d9029af95518a4591524e02460f71e967a5bf10f077b176b2cff3fe13a7e1332e3788289604010712323f21f08b7fbeda99a7266acbf51b",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}