{
  "manageEntity": {
    "action": "Save",
    "entityId": "109395262",
    "entityType": "Track",
    "nonce": "0x0f836357f0d6a1518ca63a39d2205e899cd1c56f8fc4e8742fb4473ce994f22a",
    "signature": "0xc32df39a71f05a69c7981991822523f20bf5374c82023377317e89fca4de9aa4432d4a00c37aa2d850788e7cb978b8bbf61ad1b4098d5c4b3e32f8777cbcd24a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}