{
  "manageEntity": {
    "action": "Save",
    "entityId": "189131735",
    "entityType": "Track",
    "nonce": "0x88b8eebccb40c0284f93ce05ae1d4f55f81fd20f66b7b3b4c2cc2116a1201201",
    "signature": "0x1761904a9f1e6fc82d399316d6e28d8f92a604f78304f8580e2bc76017ab497305050ea7073604a8c8c014ddbcb8f218c6382e4529b0f6c8e13a888de2ca568a1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}