{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466524176",
    "entityType": "Track",
    "nonce": "0xb5d44b3693d2b6853e3780f84dc8e5d00f5c911868429ccd3b42100043bb6508",
    "signature": "0x57da85673772c019791200567c520742b6adb6276970f235f2a7a1d0ba636e7551f31b2a97a940ba8dccec158d622068e3d92780032fe75e776355c3f9fad76f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}