{
  "manageEntity": {
    "action": "Save",
    "entityId": "978221895",
    "entityType": "Track",
    "nonce": "0xb932543b73d5b313be28f2873980469758296c50d124890ceab1cc908dba7da7",
    "signature": "0x974bf1bdcb93918d50b4cd1b0eff2722102d55e5c15e4bf4be3592ecd7a0e50f07d350f52eed8d53fe8028c0b1e83dd5d80617d7310d322050bb6124e51012241b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}