{
  "manageEntity": {
    "action": "Save",
    "entityId": "1308502669",
    "entityType": "Track",
    "nonce": "0x5927cb6d55363e171b5dce23f9de9e2758940274b58c23838ae3af25eeb0e975",
    "signature": "0x2d04123e1036f415e55dd6741a21519af2f090cb45717854e43cae0d709f08c52c75503d95c0799a424182dd85529691f25bf2418ab4ab4ddbe8cdb1236b21c61b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}