{
  "manageEntity": {
    "action": "Save",
    "entityId": "1498478233",
    "entityType": "Track",
    "nonce": "0xa7425d480eb451b130b2ebfa2e3e192c8618c765228f5e234777c11258546784",
    "signature": "0x195266bf4616b63281d2824ef65be58ba7e077cfeb21dab830fa1bde4244702b17adaf0b32f4c4c786710843b7129a090b39c2318cce8caf29f3204f941bfcbc1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}