{
  "manageEntity": {
    "action": "Save",
    "entityId": "413231",
    "entityType": "Track",
    "nonce": "0x6a6c903023c56a6109d895489cc2106de7648eec2df1935e13d502daf91e26d2",
    "signature": "0xd13649d5a1c8efe04df6031cd8f6846a949414c6abb80a21031ab7a2f80415d943c8a13ffb0906ccd87e90ff77840b772d25ee75582d3d07b64f136149154b421b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}