{
  "manageEntity": {
    "action": "Save",
    "entityId": "240082208",
    "entityType": "Track",
    "nonce": "0x5be7429b8ef0c05a605e9008aa210b40695d76d602710b35006781eece5a697d",
    "signature": "0x3f3fb661a53de1c9091c0207c0f3b11dff4d8de48fff0e1ca436ce6264cc3d9655c8a12b841c1e0fe42e49e04e53a58ae0945e02a359cc8c1ed950aa47e9864e1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}