{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592886471",
    "entityType": "Track",
    "nonce": "0xfd92079d504d52e38489422015ea5d1f148213ffc59e2c015d2bdbc7ad950401",
    "signature": "0xc1b4d06f2b4eec0be87bddd48759e5ba3a7c4d50b15742d7f2510c284701980b742b37143a666c0e64c9bed4b9c9540bc49fd6747642b6c12a6537741b4443e31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}