{
  "manageEntity": {
    "action": "Save",
    "entityId": "329744562",
    "entityType": "Track",
    "nonce": "0x2fefe1ef8b857a5d393fa3d2f6c2e6de851c890dc8d6c5eb0ca05bf7d6e32cfc",
    "signature": "0x8f923464f44ddf3814907be1b1579cbc36f064e49882bc2c64e9f10e373e8eee338d247ebe3c52cbaf394ea705c5255fe6280b904edcf16f6e4f93a5ae6635ad1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}