{
  "manageEntity": {
    "action": "Save",
    "entityId": "98420",
    "entityType": "Track",
    "nonce": "0x4bdf0fa7a409a6feb020261663a4449c467c7acaadefddcffdfa6547a570b49b",
    "signature": "0x4d2b727b77a3c21dbc3415d18d3d5f29150390af7dcf47842ce9db6f9f6bf3ac301c9ebfe0b06e35cc7187bf3cbea3bb0967fd1f705656c17fed85ddf04099611b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}