{
  "manageEntity": {
    "action": "Save",
    "entityId": "161763602",
    "entityType": "Track",
    "nonce": "0x9a27cb4901098325b3d6d3ab5c751b51f73d69f85d27b438ccd495fa43b044e8",
    "signature": "0x61231301709324755deb2efb09ea7fca05fa850aa899d128804e604107a9426167c6af4d0801b7740bbc5e023cc2ab5c383a881ed9eb56ab92f5674ae1064c301b",
    "signer": "0x70557Fc24B04767558FcB65fF06e020db51dA0c7",
    "userId": "581355348"
  }
}