{
  "manageEntity": {
    "action": "Save",
    "entityId": "380715",
    "entityType": "Track",
    "nonce": "0xd12efe2a093f098198a0804e2d05b8676b7695fba5ffe447317b04b17862f3b1",
    "signature": "0x765faa8a639f4869951d07ef36370813d0c7c7a362096142d711e8ac9c76f6c405b80e42cd31fcbc4b6e36ad210bd20f8a6405a10994a136c7c0133f2e95614c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}