{
  "manageEntity": {
    "action": "Save",
    "entityId": "487244",
    "entityType": "Track",
    "nonce": "0x9ae339fe54a654f378920290236e8243de14a9a3897a4307fae400b56a861d0e",
    "signature": "0x4660a231dfdf282c8b62170b0b7044be19e7698b18eca1750615af5d1ba2295a3fbfb1410640ab06cacc4caef0329a9b95308b17f4e2bcd5026aaadb843203c91c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}