{
  "manageEntity": {
    "action": "Save",
    "entityId": "1958650473",
    "entityType": "Track",
    "nonce": "0xc415ad10d37e9a6718c5efd0ff70ff3eb4b668fb3d7896c5cad3621c649bc2ed",
    "signature": "0x6541ff4735ece89a291f888215b4fb35097f691396dfa2608c833063a890c14869a0ee9f5bccbea0541b489cef62ab717fab37f66e2a58373c58f220376bb6a21b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}