{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099524413",
    "entityType": "Track",
    "nonce": "0x1d62fe17634f1494f515cc8a04fc879fbb3d3d68e2f13705a5cef89c0ab81265",
    "signature": "0xd35ce428d5207814b4d18cccc8b7f1913e8aa81e97f8e42749ba234a317f018f3329a69a4dfecd08bbab2e3db58b08a5c918a318d2a8ef0e1ccd59ee9c344a3f1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}