{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931775536",
    "entityType": "Track",
    "nonce": "0x31970ad35451dda1209f7f90f1f482f221c8573da05ccc4bd1434a7ab0c2c4f0",
    "signature": "0xcaace7ebf677f64b728a5f84b3e2d2124315daa91c0a37b9edc0b070731b422f2f481e9617eaeb3cb7e3eabca04ad5ad32fc4c3c15dcfafc684daf703dca636c1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}