{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894740796",
    "entityType": "Track",
    "nonce": "0x61da8ba216ae57801562091565b6693f8d7c2f62fa75c5a0a8ce3f17ed15fe4d",
    "signature": "0x9916f582b289ea759b900bacd4b02d6ac10dc576b9b0509089dfff863212bc60310bf80fd708816f10e735d944b7ed8164560f806904dd4a469ee217684ae38a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}