{
  "manageEntity": {
    "action": "Save",
    "entityId": "459218",
    "entityType": "Track",
    "nonce": "0x10ccc488d2bdeb886786cbc539c0e02921f6f35ed1af12f58582815bbf69cb11",
    "signature": "0x0f2c14915d6b24c1a0206cfb2d3320e1ed36930925365eeb99e292e5db9695f21aafc08b6c6a35c112224893fdaa121962fa555f062918b40e4a1dacf890e3cb1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}