| Param name | Description | 
|---|---|
| 
      id  required  | 
    
      
 ID of the metadatum to be updated. Validations: 
  | 
  
| 
      custom_metadatum  optional , nil allowed  | 
    
      
         Validations: 
  | 
  
| 
      custom_metadatum[value]  optional , nil allowed  | 
    
      
 The value of the metadatum. Validations: 
  |