{
  "manageEntity": {
    "action": "Save",
    "entityId": "77165",
    "entityType": "Track",
    "nonce": "0xde26af3fab692ed66e1e5eb0271461200ed2d958c3d76d1d0685c80d6e3fe0c3",
    "signature": "0x0da7cc59565e85f113265c4db7fa3d871430780b819376b3e82965b5f9f08ae96c3e971561a6e8241f00f53530eb3016decbd26a29e986af262a36273a02a10c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}