{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029386",
    "entityType": "Track",
    "nonce": "0x7558f20be4a98db7f0e2afc91c1cf83d27b20f021d768701f6b3d326c26d39fa",
    "signature": "0x767071bba6be5577485a4fd120d99df0b622bd07e87a415b3d28012f414853f127ff82fbdfad526ef2d7a08226248fe29b9bbaee52359bab27eb4b2ab879b9ca1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}