{
  "manageEntity": {
    "action": "Save",
    "entityId": "251765136",
    "entityType": "Track",
    "nonce": "0xd63d6ef0a4b9c2b12cf57da98513db629ac0e4a5ed2ffec08985d3ac1b1d9935",
    "signature": "0xe874301c90f122509ddd52c274de946425d8432b5ffede6993502a8926848cd279dff3aa7bd922abcc643a77356be30a44dffd05d134a56c54d48bba0255ddf21c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}