{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651549674",
    "entityType": "Track",
    "nonce": "0x1611bc702604f75490e1c56e5505474450829ddf82827ac953eb0510c0f33fb2",
    "signature": "0xc05ab86c69a3bf590eb06608a7c801f80c39085f7fc05cf3ba1259c0b15d59f3166995234e04993b1bd780a7fb120cda8e9b23ca037f6bb735ac4f8e5d54b8a01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}