{
  "manageEntity": {
    "action": "Save",
    "entityId": "1995442649",
    "entityType": "Track",
    "nonce": "0x0892ade223689b8be32f2417064dbbf9b921c60fc1343817a86dbbe0ac99b781",
    "signature": "0x950bc50163180ff0bd640962ad0f9728db12d250b98d0dd798eb4590a3dd9340193f4064e034d1c027ef9ecb641f7596562382372f74eb63a6ea57a3df11ae4a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}