{
  "manageEntity": {
    "action": "Save",
    "entityId": "1693320594",
    "entityType": "Track",
    "nonce": "1787391299021279717",
    "signature": "0xef44b8ffcd3b43b6b8c35f5a6b7e58ae2eef4cad6cc7fcfb97d851234b07d95e6bd8770f8bf59001e2595f0c707098b7459d2a87d065555875e87ef21c1f0eeb1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}