{
  "manageEntity": {
    "action": "Save",
    "entityId": "1567961342",
    "entityType": "Track",
    "nonce": "0xbb067ff99fe59d79dad32b2175d8dbb67a819730868f35a55994f77a341aaf24",
    "signature": "0xa34709b05988e13854517e7f459fe0e6f20a725bc006c085a01da35d5400b4bc1b3aa9ce66fe2eb9c97bb8a13a74133dbbfac4a6a9649775e424a609edcd853f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}