{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942720346",
    "entityType": "Track",
    "nonce": "0xf39336e2ad6fc16c3079cf34c2afbf08ad86aac0431b66c575f022e7b9c868d7",
    "signature": "0x5b130d764d5d310041604d6962f4c7891b70407868c9ecf9941f61499735d6e959a0f309cf72e099b23f2d4e3ef561d697c4c05de2d261017aacd31d33be4e311c",
    "signer": "0x96d53D932424EC157ea945eF88e9756380a395A6",
    "userId": "488580615"
  }
}