{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128920391",
    "entityType": "Track",
    "nonce": "0x694a5da7a1a790a4ed6d0c5985c53aa95028cc38c9cdb48c1b55abcbcfc6489a",
    "signature": "0xbe600d7da3a4e29d0d3a647ee6050f29d09d08b9523673326c5d42097aa886335910ab5e9a579ea5d65c775dc8f560e4a0ae1da095448252fd34e4f7160450681b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}