{
  "manageEntity": {
    "action": "Save",
    "entityId": "1101199",
    "entityType": "Track",
    "nonce": "0x0345da7636e99672a7302ff52d8188e96e144d768429c64da86dbaddec2e5de7",
    "signature": "0xa955f90670fb730747f065f4ab39121b0368c657493715fe1d5722f9d75882f83e1ee95dee3c142c2c4de9a108f0bceaab199e0bc546b594dbd9ed912a3ab4601c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}