{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524740377",
    "entityType": "Track",
    "nonce": "0x5594807e1efe3704e24c0ad5e2d268e3dcc6e5d6c14d46276c5a4ebefbe2f53c",
    "signature": "0x7861428005889fb3569f680481b4f8bcd38dd079455a1d40c70531049c211cc970099d3795fd85cd4b75cef732e9a4f97d7adc95610fef36f4ddfe81a179685e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}