{
  "manageEntity": {
    "action": "Save",
    "entityId": "2068730320",
    "entityType": "Track",
    "nonce": "0x963bc74672bc7a0c6a44dae62359cc5ac1eb69ca67c1cc824d663ea2bce29bd2",
    "signature": "0xe3c6a5472c8b4e1f75dad7232c1f3ec0e1882e607219d04430f86bc796b2b94d15553318a9d1fa59282ddf68e910cb2e36e62d8bbf118a1397c954c89471ea041c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}