{
  "manageEntity": {
    "action": "Save",
    "entityId": "958282509",
    "entityType": "Track",
    "nonce": "0x503b161330dd5d69d610ac24b690bc864aebe648d4d20ca4a70f4b59b5b96544",
    "signature": "0x2bd93ae22c0fd02fdb172802b194985a5c9ee8748f01b414cfba1bb498cc73fa440c9b153a76da2aba5c17eacc0d8ab2b6d2ea2d8f2904317106880b1272e2131c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}