{
  "manageEntity": {
    "action": "Save",
    "entityId": "154960",
    "entityType": "Track",
    "nonce": "0xeecec9b7fe13a570a7f693fc50ae232e7be9a33ee6ff8698a7a2a5ee5e9d7bfb",
    "signature": "0x5ba712269c3998dd60217aecc1a2772ef870e9a9e52a189d59431cd948fb993950bd2b4569a76d7d75cc6a3c3726a18c06cdb62b2f570e6e3e949cdeee6e59dd1b",
    "signer": "0x3256829bD2C36780Db69b5c18671A1DA06B8d505",
    "userId": "468369673"
  }
}