{
  "manageEntity": {
    "action": "Save",
    "entityId": "229846559",
    "entityType": "Track",
    "nonce": "0xe9fcdd171cd0a71465bd9963f098cd205c189b9a1130b4f7ae3af953219c1a1a",
    "signature": "0x691a6778f53ca9eb681c9920d14afb1225dbd4c77f4165914d3b0e53fe2c86ac1c12b002cb97f59d292bdb48ca087e4068d682993d7d960b57df49f93b7a737f1b",
    "signer": "0x70b7c172C22ca6f528F9B205cff3E32D9D6cE7dC",
    "userId": "396607"
  }
}