{
  "manageEntity": {
    "action": "Save",
    "entityId": "123106642",
    "entityType": "Track",
    "nonce": "0x164192f518dae8356ed7de7e481d39731c071a0eb1b806f2ca670856019e80a8",
    "signature": "0xeb6bb3aabab14dea15aeea477e13f93895856480bb0f3055dfc85fa43cc86cc51c6eee38f13bcddac94ad23010f2161fcccbe848edcf047ec9f8b48f771688d81b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}