{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442677224",
    "entityType": "Track",
    "nonce": "0xc00d23fc89de7852a4a5634d7fe412062e943932f2f672cd0c681b7a66de8046",
    "signature": "0x60992ed58cea1b66eb13e2b8462a8def93bc5a1af9f89ebc14861e5f0408e14c7f5f830f74a6149256d634e3385947867e694c4a1589504b11dfda867fa0c92e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}