{
  "manageEntity": {
    "action": "Save",
    "entityId": "988811596",
    "entityType": "Track",
    "nonce": "0x0d0e1d037db0c74957e3ca104ed6e4200c0242389fb6436239520b1290171d4c",
    "signature": "0x654b2ff9ea9bf8b8724c3602f44c91cb60ae3b59e6436b9e5648dc39cac75d125fa40cbbb8efd9a4d46f3634876c4e64fa111ed9a5e5bf793426654b97c702681c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}