{
  "manageEntity": {
    "action": "Save",
    "entityId": "823761",
    "entityType": "Track",
    "nonce": "0x240800a2fa4498a3c28d397210f0820a0f5d147cc2dbda8ae57534e8b458807d",
    "signature": "0x6961f7b69715d4f13dc2b43348bdeb536a156d7ee2d7a0a45bbd3ee03635bcb266bc12aa3dc289106c59490044633c117386416498f2f2234b5e36b17404276e1c",
    "signer": "0x932fB57145D18a35DAF164Ac38b6968F8c0f986b",
    "userId": "279642286"
  }
}