{
  "manageEntity": {
    "action": "Save",
    "entityId": "1727600915",
    "entityType": "Track",
    "nonce": "0x0e1e236226570e4cfe50c56eec7a242570f1d0024d325ea9c082bc250296b116",
    "signature": "0xe5aa7783429de558eb48bd9a52330bd7dab091eec9d308b35c6388af3652e5af4a2cb9be9c0c5e49c64a928ed05020bb37ee011c589babb31e273dfc577016f31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}