{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263637143",
    "entityType": "Track",
    "nonce": "0xae16f10010cf7a3228d724ead1edf0e3cab14cec5b3d0865570c5d0eef505e71",
    "signature": "0x18a89d9ab04645e392cbddb71766726fc4fd12a6fbb7924620c62b657224b18a7af37aef35778373b0df36a0b6a3e91ce1f1975545dc3d47666a76453e0963311c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}