{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262103544",
    "entityType": "Track",
    "nonce": "0x86488e85ccfa2e3ad50dc32a0d9d75f0b3d084263f230ed02fabe949838a30f5",
    "signature": "0x0425fb02cf9d230beb3e3ef2928801b4e63923738633a6399610fb8106f589ae5462897b92016e81d70bba756e6fb20d74498f6d3f11bdce45f9397757143bf21b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}