{
  "manageEntity": {
    "action": "Save",
    "entityId": "50509",
    "entityType": "Track",
    "nonce": "0x182278d2799bab085ccfaa5e069a424321e58809bcde0ab71ca426f0c88c4b50",
    "signature": "0x8f641a7fbec2dfd6e3f833a2b210e8f1f5bb018aa4aa03e7f181610c9b72355a3dfa33b086ea375221f709c2f7306d45e18d52da96ee35e6ab336defd2a36eef1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}