{
  "manageEntity": {
    "action": "Save",
    "entityId": "341406951",
    "entityType": "Track",
    "nonce": "0x308ab1cb18450650995ecf4dac551fd3f763d28b403853f99aa7a6b32502c0e1",
    "signature": "0x4746554f3801433191c4fe2eda015d03604b07dc88a570625f4ee4732a4c10cd0386a45ec1282a9a4144ded8454e94ab76fa106410a550e27a1171a3a5e74f121c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}