{
  "manageEntity": {
    "action": "Save",
    "entityId": "91926853",
    "entityType": "Track",
    "nonce": "0xab03cf5dadd49457adbec488f46fc87f01a808709bfb8f4b5e849d75212c98d5",
    "signature": "0x74d0bbf6474b8f979857157dfb37856dea212ee96ee3bf66295d8f3425ec60cc36b7453c2c9ef95abc62f3262a138d5611eb2d81bd9fcef3c36012cc52f44a391b",
    "signer": "0x44c6c9974E4028ab550E0311F9A04Df023477958",
    "userId": "152450"
  }
}