{
  "manageEntity": {
    "action": "Save",
    "entityId": "517197018",
    "entityType": "Track",
    "nonce": "0xe417306e729a20fc66830e3ffb79c5681a147824689552d93c29ab440a46466e",
    "signature": "0x33192025578b543c6afe7addb089c0616f4262b4de8e18617286a3292be5b745616bdb88aba5f41d3515848055b51d2c013102e435278a94d39a006824a9db091c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}