{
  "manageEntity": {
    "action": "Save",
    "entityId": "16765",
    "entityType": "Track",
    "nonce": "0x814f56676a48abd5031fd7d1fac639a33ad06aaf70386f56c45f16decdbffb74",
    "signature": "0x758a31453f36ae814a1159a766999b73cf548fbd5f4d9f948c51a24381c955c22a0c6f1f5526f50b84080c2d57e55f16e2ce4d0cdad52d18b9546cb2c86c94f81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}