{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614842173",
    "entityType": "Track",
    "nonce": "0xe75d0a1624cca592a7ed3b74f0391414b2d81684e816b1e18376474e325eb0d6",
    "signature": "0x6092bf7980d0ee0c6f2dedc70ee282f94dcacbf5458ab72f98a31490357178d57eed17c61e54a5f403c8e42b6144ea906e69d3d823fc13fe83fe94a348ba1ff21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}