{
  "manageEntity": {
    "action": "Save",
    "entityId": "1750752059",
    "entityType": "Track",
    "nonce": "0x0ae71feac7acccca4648f358e891c43ccee02dd2dd2579606dc9f8a7da3e0622",
    "signature": "0x6f493961c125e5eae3ec40d14e1b3134378f956e720d9fba95e4648aaa4aa36d7c1a22e0c8e1444f64bcb5924aff26edc1d8c2c6cffd6ee2c82ebcf73d49d2621c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}