{
  "manageEntity": {
    "action": "Save",
    "entityId": "605349379",
    "entityType": "Track",
    "nonce": "0x21cc034cec394657338099f1e75aef2b653601822ffc5f6548741dd7c519404c",
    "signature": "0x83bc6cf26a88ca6bdf4c4a9bd4cf1e98c818fb289ea0bac05237af25f4cc3ee542cf59041f89cb60575eb0c2c052b889d6a6a98515f42d0f6b4a351fe075eb171b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}