{
  "manageEntity": {
    "action": "Save",
    "entityId": "90952",
    "entityType": "Track",
    "nonce": "0x023b034ed6484eeed6e0cb13fd4658f98175d9bdb4478c7480f8033eba29f2a6",
    "signature": "0xd5ac2bb344ef165e9b1e33e3b701c472b57a508bb1852f1f6b82492be122b0e24121605c97904bdd7d8fb143eaa67e7f6602cbb3b8e21a1a2dacbc1d4a8496971c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}