{
  "manageEntity": {
    "action": "Save",
    "entityId": "1471740652",
    "entityType": "Track",
    "nonce": "0x028267ae466a35e98d2fb43db715ea4449195acef759741221ddd807fc56a86b",
    "signature": "0x21a0e5ddf947664b55eb0e097c43c3f41d9eff4ff92109c28c238b5e8267e4b755251264df0c65013a5aff81668961dc9ae056aefb68fe2005c8ccec01900ba81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}