{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739201719",
    "entityType": "Track",
    "nonce": "0x0a89b1e95db65f54a0be5dcba3b26839e40eaa612ddc8f1e17c4c128826df941",
    "signature": "0x6523714a742a35130fecbb4227a2239fad37aa3d8b5d94d0d208ac43dbe3faf4413a30326d9afb42d2ec07cc8ffb50d9a904e846cbf30ec266f779508b096c411c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}