{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099758655",
    "entityType": "Track",
    "nonce": "0xe81d7a3b3de8077fb31c75adcf7ace9500fc012bb712dcf8649a97202093695d",
    "signature": "0x19ab1fffebe1617f127d705156bdba999ce44f8410961ac1fea3c0221a87291814d2a9a638be1ee45e24e2ba1458bff87ef72474bbf6ed26df0a337748bbdf111b",
    "signer": "0xfb62511e019bB30f9677E9c0B2e5018F5AC6c78C",
    "userId": "77084572"
  }
}