{
  "manageEntity": {
    "action": "Save",
    "entityId": "583261938",
    "entityType": "Track",
    "nonce": "1787478872607946184",
    "signature": "0x7c4ff4142047ca40cf413c59d01206a8ccd87dbe993d05542e82b98cee44dcf444cea793aaafedb8f169929b18acdd34044c561d8238c4bbd2b616940ac54ce51c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}