{
  "manageEntity": {
    "action": "Save",
    "entityId": "1800997057",
    "entityType": "Track",
    "nonce": "0x93d58dbff9ac15e7de48799f140d42a807552501b1996bf330c12d530f6c3125",
    "signature": "0x620e384ab69d81564fe487e6ff35d0730dc9232b8e2255770ed2b142ad66b34c5100c2cb189124a2d5bb2af415b046212d68ff283637352f60686b1e5779e2381b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}