{
  "manageEntity": {
    "action": "Save",
    "entityId": "787395827",
    "entityType": "Track",
    "nonce": "0x31f7e4d3dfc4e31f8d304d73f09ef2800fe9fa972a7735a260fa23db54144ec4",
    "signature": "0x14db2080bde51bc4e1f04dcfda32547dbfc795190b078af741e29fee2be058fa1dc0ff2349cfb8b35ed0abd13e7fb29e48c392ff4c1990ed00117389c57202221b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}