{
  "manageEntity": {
    "action": "Save",
    "entityId": "1818671695",
    "entityType": "Track",
    "nonce": "0xad3c42e472266d8a5e7e26a115b3575c4704c3a63e12e8fa24582971e765c750",
    "signature": "0xe9ab02555c507553260ff993967ae072ac4eccb995cd4f52fd4cd853639c6d603fe7c6ea87b5437c26d3d93619c3279832803e84a958c8bda49c031601de43e41c",
    "signer": "0xaBD3977da320800B2e96C8FBf1903a81B79B93c7",
    "userId": "947122138"
  }
}