{
  "manageEntity": {
    "action": "Save",
    "entityId": "1528069878",
    "entityType": "Track",
    "nonce": "0x1a16ee89ca32cbabc029813c2a10bedfc0ba4c7830a0adb0fa1b635871fc3096",
    "signature": "0x3a62750edb1e5d42e7609474dd04d3d010d3733bbcc3709508ea9c7997522fba55efc6efe4872bf352644cfa5e02c221076b8109ee9aba7896fce93e00b656761b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}