{
  "manageEntity": {
    "action": "Save",
    "entityId": "172625050",
    "entityType": "Track",
    "nonce": "0x852d9912aa768792bdebca80014f16393e52a6ad1adba0e2fea9dadfe83c1522",
    "signature": "0xc3d2deea8eef5a9bea497370e0b95799ef734d7b8f3d522d5aa255c44480294f6f909678fcc02cf1652d826526a9caea2439d4c59ae8b94bedd36af7f32f76291c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}