{
  "manageEntity": {
    "action": "Save",
    "entityId": "542965",
    "entityType": "Track",
    "nonce": "0x5aca172f61391b98d3ff6ad5fddc9224fa4ebccbf86afc304618dbf481148acc",
    "signature": "0x0d2c090729ff3ea6ef5aca651927932ce66daef99bbc16aed821f2f21e2b89975b8dc11b8e4987dcb98fdc4f2b459aced7a76bbb1de8eeab4ece763b19af63251c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}