{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594941580",
    "entityType": "Track",
    "nonce": "0x4a4168281d80e34a7a57c4a99798ef56587f03f89b4472d3eae59902220f77b4",
    "signature": "0xa2bccc3d19aedca8b40ce8fe7de039894e764d98c02a9ce6828fe1a1f972e23c29f54d647b9722c3ddadec898be30529cf75a8d3b559a18b020a32efab9e63aa1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}