{
  "manageEntity": {
    "action": "Save",
    "entityId": "467700",
    "entityType": "Track",
    "nonce": "0xbe551ec2d04416674831100ce7c25752ac99994a8be674e5e602fad678e8fa16",
    "signature": "0xb3dc862cbef7b7041bc3e6e1b3eaca14dcc03f27ea0c1f5769a8d145a6e96b00189c267cd0e68e84e21f93e94a67d5c7bebb6827a6685b778e935412fa05586e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}