{
  "manageEntity": {
    "action": "Save",
    "entityId": "193310",
    "entityType": "Track",
    "nonce": "0xa9b026012e581c3c00cec0d98aa93a182bee55da613cfc0f0f1048d5faa777d4",
    "signature": "0x0a818acf5df748a022bdf27e3ab5f96ed53887b64f05055d5332cf7c1bc1811a271d7e089877ddcefb36955b745d87177b76db4496127c4521b089b0ce3064be1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}