{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662217069",
    "entityType": "Track",
    "nonce": "0xc3b289a272468397e1fe920948267bd471af263f0b934b699d95663cd4693c44",
    "signature": "0x4d993331c6665afb4670bda2b46da22cdd868d09a6a8d2a89e96304ada8bf2011a866fcda57e8dd5b69a1556909e80cfcc791a0a590721874eb9b911544b3f3c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}