{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789123642",
    "entityType": "Track",
    "nonce": "1792341476029294267",
    "signature": "0x59ca7463750d13b650455ab0463a0b634ad69efe612de5a756f46575921df7257dd07bc870a2441910aa93e9fec0ae051290c8814ea44881b9a2083e27cf7f841b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}