{
  "manageEntity": {
    "action": "Save",
    "entityId": "1519418459",
    "entityType": "Track",
    "nonce": "0xba8245e0ad6200082c79acc6fca5355d724332bbf126bee466a666e675e1c606",
    "signature": "0xc7548464d659b70f24d1a1f58bf41283098a7bc1f225b194a2726bc72f662a216b084fccfcd661b8dfa40029c5086a1670c95ee9b6b0e3bbe71a6ca93bc6d90e1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}