{
  "manageEntity": {
    "action": "Save",
    "entityId": "169585680",
    "entityType": "Track",
    "nonce": "0x16fbfbcbe2813e19198993a07f0cd732f89cdeba17356af2a352cb1e6a12b8e5",
    "signature": "0xef0b19a76e93d3df5cd725f56dc0bdbf54bddd30eb87cd534b43a24af4e346c03d50f84ae193ae801923c99b91551145d55d498329a468dc97b4a4261a7835cc1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}