{
  "manageEntity": {
    "action": "Save",
    "entityId": "240946097",
    "entityType": "Track",
    "nonce": "0x66c18d745b3d330d22fd2f63ee117789f7e954a0cd5ab4a0761a275281714267",
    "signature": "0xffdc37abd7d91fb4264b8a4b70433b511f06fb28931ebcc1bc4f9551000774ea55f68367697df21802deca9f196d0f923b4c913d465835a1ca5e55b7b2e3c8cd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}