{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994685059",
    "entityType": "Track",
    "nonce": "0xf29ddf0d106abe478a140c411d372ec87b9d1087584e68f1fa9fa5aa0f58c50e",
    "signature": "0x3d9a9ea14584bc119a995a954ac5946d320f39f6b75353d89188bdeb48167ea25ae3da2ca0492d8add5c8be44e419e3334400505280ddbb2ab9c78d1381e762b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}