{
  "manageEntity": {
    "action": "Save",
    "entityId": "152528336",
    "entityType": "Track",
    "nonce": "0x913a2b8a2553d08adab140aa652f9dbc14b3fc6ec65cd38ed83987c3728e2740",
    "signature": "0xb72cba68bb7bf927c21c12d1d2b0528354e5330f6cbe0e493ad39652eceb5ca04a336139254591b8301c174113def676ab039f0fb8320156531fb1ee651ceeb31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}