{
  "manageEntity": {
    "action": "Save",
    "entityId": "191342",
    "entityType": "Track",
    "nonce": "0x73387cd36448ced395426bd9c1ae37c9314a2d8334aac49c26f90b363711b28b",
    "signature": "0x13cb4690cd16f0d7700be57216090e2256cb634a8db360c0b335ef12a43ff0062318ae48ec051c08b338e80d13ebcb340f73778cdba6830f0ed9e9a0266747751b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}