{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951602804",
    "entityType": "Track",
    "nonce": "0xd6298c34686b0635b9ebc584221028fd8aad1d15edb450b8052f446a93aa367b",
    "signature": "0xc785fb923a4a36dbd8102611f15daabb7106d2409db169ed2e32c2e189379c9f243459669bfb05bba3a5d14481d6e820d67742d720c6b9932c28c093502e97301c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}