{
  "manageEntity": {
    "action": "Save",
    "entityId": "434160757",
    "entityType": "Track",
    "nonce": "1788456082632043379",
    "signature": "0x40fe66da76716b53df3917ba0f84a8644fe5744ed65c7ef6e9cc56d16e75f42d1b630a1853f2dc4fb210aa42acd2ddc61d9118f43c4980504b4a53ffd74684a21c",
    "signer": "0xF1f4D1515EDE23445C949c6a8dBaE8a064153588",
    "userId": "199729601"
  }
}