{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677311676",
    "entityType": "Track",
    "nonce": "1790005442381341106",
    "signature": "0x072c3fe14b3048b016c1caf2f68f7d3a075097956a1baf85d8ee50746d237928297758c1f89c3e6febbeceb611220540d0e4695fb24adf5eb8ab8c2b484feca21c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}