{
  "manageEntity": {
    "action": "Save",
    "entityId": "209269",
    "entityType": "Track",
    "nonce": "0x3492ac8a283b212b8c2ed48d8b340de42584e18d7ca5afffcc1f9f465637bfbe",
    "signature": "0xa9fa502fa1e4eabd3d8cf473a96b7301a7184eca6b61499d7791980d248c67145a172813b18d4ddc349fa4d3d5eb62731321aa06317deb96c4e986c13e6cb28e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}