{
  "manageEntity": {
    "action": "Save",
    "entityId": "220596",
    "entityType": "Track",
    "nonce": "0x586b031cca9b4e73942d4a065cd58798981a4f04f99288e277e54a64495beed9",
    "signature": "0x07b36d86e93302a0455bbb97cfa1dcd088385c81b068228ba6121dfebfab6eae2f390691e0275ef488dd375076a5b02b5cc0c6302e1ae804738733144c4487b51b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}